{"title":"42,000 BTU\/ 3.5 TON","description":"\u003cstyle\u003e\n    .ms4l-sz{\n      --bg:#f8fafc;\n      --surface:#ffffff;\n      --text:#0f172a;\n      --muted:#64748b;\n      --border:#e5e7eb;\n      --accent:#4f46e5;\n      --accent2:#1d4ed8;\n      --soft:#eef2ff;\n      --good:#059669;\n      --warn:#f59e0b;\n      --highlight:#fef08a;\n\n      --radius-lg:18px;\n      --radius-md:14px;\n      --radius-pill:999px;\n      --shadow:0 18px 50px rgba(15,23,42,.10);\n      --shadow2:0 10px 24px rgba(15,23,42,.10);\n\n      font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, \"Apple Color Emoji\",\"Segoe UI Emoji\";\n      color:var(--text);\n      background:linear-gradient(180deg, var(--bg), #ffffff);\n      border:1px solid var(--border);\n      border-radius:var(--radius-lg);\n      padding:22px;\n      box-shadow:var(--shadow);\n      max-width:1100px;\n      margin:18px auto;\n    }\n\n    .ms4l-sz *{ box-sizing:border-box; }\n    .ms4l-sz a{ color:var(--accent2); 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\n        border-left: 4px solid #0066cc; \n        padding: 15px;\n        margin: 20px 0;\n        border-radius: 0 4px 4px 0;\n        font-family: 'Roboto', sans-serif; \n        box-shadow: 0 2px 4px rgba(0,0,0,0.05);\n    }\n\n    .msfl-audio-header {\n        display: flex;\n        align-items: center;\n        margin-bottom: 8px;\n        color: #333;\n        font-weight: 600;\n        font-size: 14px;\n    }\n\n    .msfl-icon {\n        margin-right: 8px;\n        font-size: 18px;\n    }\n\n    #msfl-player {\n        height: 40px;\n        outline: none;\n    }\n\u003c\/style\u003e\n\n\u003csection aria-label=\"3.5 Ton 42,000 BTU Ductless Mini Split Collection\" class=\"ms4l-sz\"\u003e\n  \u003cdiv class=\"ms4l-sz-top\" id=\"ms4l-sz-top\"\u003e\n    \u003cdiv aria-label=\"3.5 Ton mini split overview\" class=\"ms4l-sz-hero\"\u003e\n      \u003cdiv class=\"ms4l-sz-kicker\"\u003e⚡ 3.5 Ton • High-Capacity Comfort\u003c\/div\u003e\n      \u003ch2 class=\"ms4l-sz-title\"\u003e42,000 BTU (3.5 Ton) Ductless Mini Splits (AC \u0026amp; Heat Pump)\u003c\/h2\u003e\n      \u003cp class=\"ms4l-sz-sub read-audio\"\u003eDiscover our premium collection of \u003cstrong\u003e42,000 BTU (3.5 ton) ductless mini split air conditioners\u003c\/strong\u003e built for \u003cem\u003epowerful, year-round heating and cooling\u003c\/em\u003e. Ideal for whole-home solutions or expansive commercial areas, these systems from trusted brands like \u003cstrong\u003eCooper \u0026amp; Hunter\u003c\/strong\u003e, \u003cstrong\u003eOLMO\u003c\/strong\u003e, and \u003cstrong\u003eBRAVO\u003c\/strong\u003e deliver robust performance to handle your most demanding climate needs.\u003c\/p\u003e\n      \n      \u003cul aria-label=\"Popular 3.5 ton mini split use cases\" class=\"ms4l-sz-pills\"\u003e\n        \u003cli class=\"ms4l-sz-pill\"\u003e🏡 \u003cb\u003eLarge Multi-Story Homes\u003c\/b\u003e\n\u003c\/li\u003e\n        \u003cli class=\"ms4l-sz-pill\"\u003e🏢 \u003cb\u003eOpen Floorplans\u003c\/b\u003e\n\u003c\/li\u003e\n        \u003cli class=\"ms4l-sz-pill\"\u003e🏭 \u003cb\u003eWarehouses \u0026amp; Workshops\u003c\/b\u003e\n\u003c\/li\u003e\n        \u003cli class=\"ms4l-sz-pill\"\u003e🏪 \u003cb\u003eCommercial Zones\u003c\/b\u003e\n\u003c\/li\u003e\n        \u003cli class=\"ms4l-sz-pill\"\u003e❄️ \u003cb\u003eExtreme Cold Climates\u003c\/b\u003e\n\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n    \n    \u003caside aria-label=\"Quick navigation and buying tips\" class=\"ms4l-sz-side\"\u003e\n      \u003cnav aria-label=\"Collection table of contents\" class=\"ms4l-sz-nav\"\u003e\n        \u003cp class=\"ms4l-sz-nav-title\"\u003eSummary \u0026amp; Quick Links\u003c\/p\u003e\n        \u003cul class=\"ms4l-sz-nav-links\"\u003e\n          \u003cli\u003e\u003ca aria-label=\"Jump to overview\" href=\"#ms4l-sz-overview\"\u003e✨ Key Benefits\u003c\/a\u003e\u003c\/li\u003e\n          \u003cli\u003e\u003ca aria-label=\"Jump to BTU conversion\" href=\"#ms4l-sz-size\"\u003e📏 BTU to TON Chart\u003c\/a\u003e\u003c\/li\u003e\n          \u003cli\u003e\u003ca aria-label=\"Jump to deals section\" href=\"#ms4l-sz-deals\"\u003e🎯 Top Deals\u003c\/a\u003e\u003c\/li\u003e\n          \u003cli\u003e\u003ca aria-label=\"Jump to FAQ\" href=\"#ms4l-sz-faq\"\u003e❓ Expert FAQ\u003c\/a\u003e\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/nav\u003e\n      \n      \u003cdiv aria-label=\"What is a 42k BTU system\" class=\"ms4l-sz-card\"\u003e\n        \u003ch3\u003eWhy choose 42,000 BTU?\u003c\/h3\u003e\n        \u003cp\u003eA \u003cmark\u003e42K BTU (3.5 Ton)\u003c\/mark\u003e output is the ultimate powerhouse for large spaces. It serves as a highly reliable, energy-efficient alternative to bulky, expensive packaged central AC units—especially when traditional ductwork isn’t practical or possible.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \n      \u003cdiv aria-label=\"Tip for electrical requirements\" class=\"ms4l-sz-card\"\u003e\n        \u003ch3\u003e⚡ Quick Pro Tip: Electrical\u003c\/h3\u003e\n        \u003cp\u003eEnsure correct electrical sizing! 42k BTU units are heavy-duty and typically require \u003cstrong\u003e208–230V\u003c\/strong\u003e, a dedicated \u003cstrong\u003e240V circuit\u003c\/strong\u003e, and a \u003cstrong\u003e38–60A breaker\u003c\/strong\u003e. Always verify specs with your licensed installer.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/aside\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv aria-label=\"3.5 ton mini split buying guide sections\" class=\"ms4l-sz-grid\"\u003e\n    \u003csection aria-label=\"3.5 ton mini split benefits\" class=\"ms4l-sz-block\" id=\"ms4l-sz-overview\"\u003e\n      \u003ch2 class=\"read-audio\"\u003eWhy Homeowners \u0026amp; Pros Love 3.5 Ton Systems\u003c\/h2\u003e\n      \u003cp class=\"read-audio\"\u003eStepping up to a 42,000 BTU ductless system gives you commercial-grade climate control, incredible multi-room flexibility, and massive energy savings without sacrificing sheer power.\u003c\/p\u003e\n      \u003cul aria-label=\"3.5 ton mini split key advantages\" class=\"ms4l-sz-bullets\"\u003e\n        \u003cli\u003e\n          \u003cspan\u003e✓\u003c\/span\u003e\n          \u003cdiv\u003e\n            \u003cb\u003eMassive Coverage Area\u003c\/b\u003e\u003cbr\u003eEfficiently cools and heats large, demanding spaces typically ranging from \u003cmark\u003e1,750 to 2,300 sq ft\u003c\/mark\u003e, depending on your climate zone and insulation.\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n        \u003cli\u003e\n          \u003cspan\u003e✓\u003c\/span\u003e\n          \u003cdiv\u003e\n            \u003cb\u003eMulti-Zone Flexibility\u003c\/b\u003e\u003cbr\u003eMany 42k BTU outdoor compressors can connect to \u003cstrong\u003eup to 4 or 5 indoor air handlers\u003c\/strong\u003e, allowing you to create custom temperature zones for the whole house.\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n        \u003cli\u003e\n          \u003cspan\u003e✓\u003c\/span\u003e\n          \u003cdiv\u003e\n            \u003cb\u003eInverter-Driven Efficiency\u003c\/b\u003e\u003cbr\u003eSmart variable-speed compressors ramp up and down smoothly. This prevents massive energy spikes, saving you up to 30% on utility bills while delivering \u003cem\u003econsistent indoor comfort\u003c\/em\u003e.\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n        \u003cli\u003e\n          \u003cspan\u003e✓\u003c\/span\u003e\n          \u003cdiv\u003e\n            \u003cb\u003eHyper-Heat Capable\u003c\/b\u003e\u003cbr\u003eSelect 3.5 Ton models come equipped with advanced low-ambient heating technology, keeping your home warm even when outdoor temperatures plunge to \u003cstrong\u003e-22°F\u003c\/strong\u003e.\n          \u003c\/div\u003e\n        \u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp style=\"margin-top: 12px; font-weight: 500;\"\u003eNeed exact sizing? Use our \u003ca aria-label=\"HVAC load calculator link\" title=\"How to size a mini split system correctly\" href=\"\/pages\/hvac-load-calculator\"\u003eHVAC Load Calculator\u003c\/a\u003e to estimate the best BTU size for your unique space.\u003c\/p\u003e\n    \u003c\/section\u003e\n\n    \u003csection aria-label=\"BTU and TON conversion guide\" class=\"ms4l-sz-block\" id=\"ms4l-sz-size\"\u003e\n      \u003ch2\u003e🤔 What is BTU and TON in HVAC?\u003c\/h2\u003e\n      \u003cp\u003e\u003cstrong\u003eBTU (British Thermal Unit)\u003c\/strong\u003e measures the precise amount of heat an AC can move in one hour. \u003cstrong\u003eTON\u003c\/strong\u003e expresses that same capacity in a simplified format (1 ton = 12,000 BTU\/hr).\u003c\/p\u003e\n      \n      \u003ctable aria-label=\"Comprehensive BTU to TON conversion table\" class=\"ms4l-sz-table\" style=\"margin-top: 15px;\"\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eBTU\/hr\u003c\/th\u003e\n            \u003cth\u003eTON Capacity\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003e6,000\u003c\/td\u003e\n\u003ctd\u003e0.5 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e9,000\u003c\/td\u003e\n\u003ctd\u003e0.75 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e12,000\u003c\/td\u003e\n\u003ctd\u003e1.0 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e18,000\u003c\/td\u003e\n\u003ctd\u003e1.5 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e19,000\u003c\/td\u003e\n\u003ctd\u003e1.58 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e24,000\u003c\/td\u003e\n\u003ctd\u003e2.0 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e28,000\u003c\/td\u003e\n\u003ctd\u003e2.33 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e30,000\u003c\/td\u003e\n\u003ctd\u003e2.5 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e36,000\u003c\/td\u003e\n\u003ctd\u003e3.0 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr style=\"background: rgba(79,70,229,.08);\"\u003e\n            \u003ctd\u003e\u003cstrong\u003e42,000\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e3.5 Ton \u003cmark\u003e(This Collection)\u003c\/mark\u003e\u003c\/strong\u003e\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e48,000\u003c\/td\u003e\n\u003ctd\u003e4.0 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e55,000\u003c\/td\u003e\n\u003ctd\u003e4.58 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003e60,000\u003c\/td\u003e\n\u003ctd\u003e5.0 Ton\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cdiv aria-label=\"Conversion note\" class=\"ms4l-sz-note\"\u003e\n\u003cstrong\u003ePro Tip:\u003c\/strong\u003e A higher BTU rating means a more powerful system for larger spaces. Never under-size your system in areas with extreme summer heat or poor insulation.\u003c\/div\u003e\n    \u003c\/section\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv aria-label=\"Promotional Sale on 3.5 Ton Systems\" class=\"ms4l-sz-cta\" id=\"ms4l-sz-deals\"\u003e\n    \u003cdiv\u003e\n      \u003ch3\u003e🎯 Limited-Time Deals on 3.5 Ton Mini Split Systems\u003c\/h3\u003e\n      \u003cp\u003e🔥 Upgrade to a high-capacity \u003cstrong\u003e42,000 BTU ductless AC unit \u0026amp; heat pump\u003c\/strong\u003e today. Shop our exclusive discounts, clearance bundles, and start enjoying energy-efficient savings!\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003ca title=\"Shop Clearance 3.5 Ton Mini Split Systems\" aria-label=\"Shop clearance 3.5 ton ductless mini split AC deals\" href=\"\/collections\/sale\" class=\"ms4l-sz-btn\"\u003e\n      Shop Deals Now \u003cspan class=\"arrow\"\u003e→\u003c\/span\u003e\n    \u003c\/a\u003e\n  \u003c\/div\u003e\n  \n  \u003csection aria-label=\"3.5 Ton Mini Split FAQ\" class=\"ms4l-sz-faq\" id=\"ms4l-sz-faq\"\u003e\n    \u003cdiv class=\"ms4l-sz-faq-head\"\u003e\n      \u003ch2\u003eExpert FAQ – 42,000 BTU (3.5 Ton) Ductless Mini Splits\u003c\/h2\u003e\n    \u003c\/div\u003e\n    \n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: coverage area\"\u003e\u003cspan class=\"icon\"\u003e📏\u003c\/span\u003e What size area does a 42,000 BTU (3.5 ton) mini split cover? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003eA 42,000 BTU system typically covers between \u003cstrong\u003e1,750 and 2,300 square feet\u003c\/strong\u003e. Actual coverage depends heavily on your home's insulation quality, ceiling height, the number of windows, and your local climate zone. It’s an exceptional choice for multi-room whole-house setups, large workshops, or expansive open-concept great rooms.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: single vs multi zone\"\u003e\u003cspan class=\"icon\"\u003e🎛️\u003c\/span\u003e Should I get a Single-Zone or Multi-Zone 3.5 Ton system? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003eIt depends on your space! If you are cooling\/heating one massive open area (like a warehouse, garage, or large hall), a \u003cstrong\u003eSingle-Zone\u003c\/strong\u003e is best. If you want to cool multiple bedrooms or separate floors, you should buy a \u003cstrong\u003eMulti-Zone\u003c\/strong\u003e system, which allows you to attach up to 5 separate indoor air handlers to a single 42k BTU outdoor unit.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: cold weather\"\u003e\u003cspan class=\"icon\"\u003e❄️\u003c\/span\u003e Will a 42,000 BTU system work in freezing winter temperatures? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003eYes! Look for models labeled with \u003cstrong\u003eHyper Heat\u003c\/strong\u003e or \u003cstrong\u003eLow Ambient Heating\u003c\/strong\u003e. Standard heat pumps lose efficiency around freezing, but hyper-heat 3.5 Ton models are engineered to provide reliable, 100% heating capacity even when outdoor temperatures drop as low as -13°F to -22°F.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: pricing\"\u003e\u003cspan class=\"icon\"\u003e💲\u003c\/span\u003e How much does a 3.5 ton ductless system cost? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003eThe equipment itself usually costs between \u003cstrong\u003e$3,000 and $8,000\u003c\/strong\u003e depending on the brand, SEER rating, and how many indoor zones are included. Fully installed, the total ranges from $5,500 to $13,000+ depending on the complexity of the installation, length of the line sets, and your local contractor's labor rates.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: SEER rating\"\u003e\u003cspan class=\"icon\"\u003e🌱\u003c\/span\u003e What is SEER\/SEER2 and why is it important? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003e\n\u003cstrong\u003eSEER (Seasonal Energy Efficiency Ratio)\u003c\/strong\u003e measures how efficiently an air conditioner cools your home over a typical season. Higher numbers mean better energy efficiency and lower electricity bills. When shopping for a 3.5 Ton system, look for a high SEER2 rating (e.g., 20+ SEER2) to maximize your long-term energy savings and qualify for potential local energy rebates.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: electrical setup\"\u003e\u003cspan class=\"icon\"\u003e⚡\u003c\/span\u003e What electrical setup is required for a 42k BTU unit? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003eDue to their high capacity, most 3.5 ton units require a \u003cstrong\u003e208–230V power supply\u003c\/strong\u003e, a dedicated \u003cstrong\u003e240V circuit\u003c\/strong\u003e, and a \u003cstrong\u003e38–60 Amp breaker\u003c\/strong\u003e. The exact requirements vary by manufacturer, so it is critical that a licensed electrician reviews the installation manual prior to setup.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \n    \u003cdetails\u003e\n      \u003csummary aria-label=\"FAQ question: breaker sizing\"\u003e\u003cspan class=\"icon\"\u003e🔌\u003c\/span\u003e How do I size the breaker and wire gauge correctly? \u003cspan class=\"chev\"\u003e›\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"answer\"\u003ePer NEC guidelines, units in the 36k–42k BTU range generally require a \u003cstrong\u003e30–40A breaker (240V)\u003c\/strong\u003e paired with \u003cstrong\u003e#10 to #8 AWG copper wire\u003c\/strong\u003e depending on the run length from the electrical panel. \u003cstrong\u003eAlways confirm\u003c\/strong\u003e the specific MCA (Minimum Circuit Ampacity) and MOP (Maximum Overcurrent Protection) listed on the manufacturer's nameplate of your Cooper \u0026amp; Hunter, Olmo, or Bravo system.\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/section\u003e\n  \n  \u003cdiv aria-label=\"Collection footer notes\" class=\"ms4l-sz-foot\"\u003e\n    \u003cspan\u003e💡 \u003cstrong\u003eShopping Tip:\u003c\/strong\u003e For fastest results, use our sidebar filters to sort by \u003cstrong\u003eBTU capacity\u003c\/strong\u003e, \u003cstrong\u003eNumber of Zones\u003c\/strong\u003e, and \u003cstrong\u003eBrand\u003c\/strong\u003e.\u003c\/span\u003e \n    \u003ca aria-label=\"Back to top\" href=\"#ms4l-sz-top\" class=\"ms4l-sz-backtop\"\u003e↑ Back to top\u003c\/a\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e","products":[{"product_id":"olmo-42-000-btu-tri-zone-12000-12000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 3-Zone 12k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 3-Zone Ductless Mini Split System features a nominal total cooling capacity of 42,000 BTU, with three wall-mount zones including one 18,000 BTU unit and two 12,000 BTU units, using R454B refrigerant and offering optional Wi-Fi control. It is designed for operation in ambient temperatures as low as -4°F, with an outdoor unit model OS-RMS42-230VO.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (18,000 BTU, 12,000 BTU, 12,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47817794650357,"sku":"OS-RMS42-230VOM18SRWM12SRWM12SRW-NO\/NO\/NO","price":3103.65,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47817794683125,"sku":"OS-RMS42-230VOM18SRWM12SRWM12SRW-NO\/NO\/16FT","price":3266.94,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47817794715893,"sku":"OS-RMS42-230VOM18SRWM12SRWM12SRW-NO\/NO\/25FT","price":3308.41,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46072008868085,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRW-NO","price":3250.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818173317365,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRW-16FT","price":3903.98,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818173350133,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRW-25FT","price":4069.87,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818173448437,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRW-50FT","price":4945.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-9k-9k-wall-mount-230v-r454b-943.webp?v=1786733070"},{"product_id":"olmo-42-000-btu-five-zone-9000-9000-9000-9000-9000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+9k+9k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46072028365045,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM09SRW-NO","price":3485.7,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822185988341,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM09SRW-16FT","price":4302.18,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822186021109,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM09SRW-25FT","price":4509.54,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822186053877,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM09SRW-50FT","price":5604.66,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-9k-9k-wall-mount-230v-r454b-226.webp?v=1786732996"},{"product_id":"olmo-42-000-btu-tri-zone-9000-18000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 3-Zone 9k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 3-Zone Ductless Mini Split System features three wall-mount zones with a combined nominal total cooling capacity of 42,000 BTU, using R454B refrigerant and operating down to -4°F ambient temperatures. It includes an optional Wi-Fi control feature and an outdoor unit model OS-RMS42-230VO for efficient heating and cooling.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (9,000 BTU, 18,000 BTU, 18,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47817924542709,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRW-NO\/NO\/NO","price":3164.4,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47817924575477,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRW-NO\/NO\/16FT","price":3352.32,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47817924608245,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRW-NO\/NO\/25FT","price":3392.49,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It includes the OS-RMS42-230VO outdoor unit, capable of operation down to -4°F, with optional Wi-Fi control for convenient temperature management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (12,000 BTU, 18,000 BTU, 18,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47817934799093,"sku":"OS-RMS42-230VOM12SRWM18SRWM18SRW-NO\/NO\/NO","price":3171.15,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47817934831861,"sku":"OS-RMS42-230VOM12SRWM18SRWM18SRW-NO\/NO\/16FT","price":3359.07,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47817934864629,"sku":"OS-RMS42-230VOM12SRWM18SRWM18SRW-NO\/NO\/25FT","price":3399.24,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46087657718005,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRW-NO","price":3325.05,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818172268789,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRW-16FT","price":4002.85,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818172530933,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRW-25FT","price":4167.45,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818172596469,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRW-50FT","price":5027.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-9k-18k-wall-mount-230v-r454b-496.webp?v=1786733084"},{"product_id":"olmo-42-000-btu-four-zone-9000-9000-12000-12000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 12,000 BTU, 12,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46087768998133,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRW-NO","price":3264.3,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818171449589,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRW-16FT","price":3917.48,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818171547893,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRW-25FT","price":4083.37,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818171613429,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRW-50FT","price":4959.46,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-12k-12k-wall-mount-230v-r454b-952.webp?v=1786732939"},{"product_id":"olmo-42-000-btu-four-zone-9000-12000-12000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+12k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 18,000 BTU, 12,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46087798915317,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM18SRW-NO","price":3338.55,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818171056373,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM18SRW-16FT","price":4016.35,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818171121909,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM18SRW-25FT","price":4180.95,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818171220213,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM18SRW-50FT","price":5041.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-12k-12k-18k-wall-mount-230v-r454b-495.webp?v=1786732932"},{"product_id":"olmo-42-000-btu-four-zone-12000-12000-12000-12000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO 42,000 BTU 4-Zone 12k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System features four wall-mount zones, each with 12,000 cooling BTU, and uses R454B refrigerant for efficient performance. It includes an outdoor unit OS-RMS42-230VO with a nominal total capacity of 42,000 BTU and supports optional Wi-Fi control.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46093435928821,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRW-NO","price":3277.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818169647349,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRW-16FT","price":3930.98,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818169680117,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRW-25FT","price":4096.87,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818169811189,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRW-50FT","price":4972.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-42-000-btu-four-zone-12000-wall-mount-ductless-mini-split-a-c-373.webp?v=1746034835"},{"product_id":"olmo-42-000-btu-four-zone-12000-12000-12000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO 42,000 BTU 4-Zone 12k+12k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System provides 42,000 BTU of cooling capacity across four wall-mount zones, using R454B refrigerant for efficient performance. It includes three zones with 12,000 BTU cooling and one zone with 18,000 BTU cooling, along with optional Wi-Fi control for remote management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 18,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46093441794293,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM18SRW-NO","price":3345.3,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818170040565,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM18SRW-16FT","price":4023.1,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818170663157,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM18SRW-25FT","price":4187.7,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818170728693,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM18SRW-50FT","price":5048.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-42-000-btu-four-zone-12000-18000-wall-mount-ductless-mini-247.webp?v=1746042441"},{"product_id":"olmo-42-000-btu-four-zone-9000-9000-9000-24000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+9k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 24,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (24,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46093447725301,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM24SRW-NO","price":3365.55,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47818172858613,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM24SRW-16FT","price":4049.83,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47818172956917,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM24SRW-25FT","price":4290.89,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47818173022453,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM24SRW-50FT","price":5253.82,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-9k-24k-wall-mount-230v-r454b-441.webp?v=1786733091"},{"product_id":"olmo-42-000-btu-four-zone-9000-9000-9000-9000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+9k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 18,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (18,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46093482000629,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM18SRW-NO","price":3559.95,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822187495669,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM18SRW-16FT","price":4401.05,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822187561205,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM18SRW-25FT","price":4607.11,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822187790581,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM18SRW-50FT","price":5686.68,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-9k-18k-wall-mount-230v-r454b-872.webp?v=1786732004"},{"product_id":"olmo-42-000-btu-four-zone-9000-9000-9000-12000-12000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 12,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (12,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":46093490979061,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM12SRW-NO","price":3499.2,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822188282101,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM12SRW-16FT","price":4315.68,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822188314869,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM12SRW-25FT","price":4523.04,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822188380405,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM12SRW-50FT","price":5618.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-12k-12k-wall-mount-230v-r454b-281.webp?v=1786731968"},{"product_id":"bravo-42-000-btu-3-zone-9000-12000-18000-btu-wall-mount-ductless-mini-split-a-c-and-heater-with-25ft-installation-kits","title":"BRAVO 42,000 BTU 3-Zone 9k+12k+18k Wall Mount, 230V, R32 - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe Bravo Milano 3-Zone Ductless Mini Split System features three wall-mounted zones with combined nominal total cooling capacity of 42,000 BTU, utilizing R32 refrigerant for efficient performance. It offers smart app control via Wi-Fi, a SEER2 rating of 24, and operates effectively in heating mode down to -13°F ambient temperatures.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the BRV-M42-230VO outdoor unit powers 3 independently controlled Bravo Milano indoor units (up to 5 max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones, each room on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 SEER2\u003c\/strong\u003e inverter efficiency — cools and heats from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat pump — heats down to -13°F\u003c\/strong\u003e outdoor ambient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR32 refrigerant\u003c\/strong\u003e, factory pre-charged; smart app control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e BRV-M42-230VO — Bravo Milano R32 multi-zone outdoor unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e BRV-M09WM-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e BRV-M12WM-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e BRV-M18WM-230VI (17,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — BRV-M42-230VO Outdoor Unit\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208–230V \/ 1 Ph \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capacity (Range)\u003c\/td\u003e\n\u003ctd\u003e42,000 (range 8,350-46,000) Btu\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity (Range)\u003c\/td\u003e\n\u003ctd\u003e42,000 (range 8,450-53,000) Btu\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSPF2 (Region IV)\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOP\u003c\/td\u003e\n\u003ctd\u003e3.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e32 A \/ 45 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003eup to 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e4,235 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e60 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e24.6 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e263 ft \/ 115 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e-13 to 125.6°F \/ -13 to 75.2°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e39.80 × 15.75 × 51.97 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e205.0 \/ 224.9 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official Bravo Milano multi-zone leaflet; combined-system capacity varies with the indoor-unit mix.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eBRV-M09WM-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eBRV-M12WM-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eBRV-M18WM-230VI\u003c\/td\u003e\n\u003ctd\u003e17,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this Bravo Milano system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system — the BRV-M42-230VO outdoor unit connects to 3 indoor units (9,000 BTU, 12,000 BTU, 17,000 BTU), each controlled independently, so it conditions 3 separate rooms or areas at once.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes — it is an inverter heat pump that both cools and heats, with rated heating down to -13°F outdoor ambient, so it works year-round in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR32 — an efficient single-component refrigerant. The system ships factory pre-charged; a licensed installer adjusts the charge for your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes. Choose a copper line-set kit length per zone at checkout, or supply your own.\u003c\/p\u003e\u003ch3\u003eWho should install it?\u003c\/h3\u003e\u003cp\u003eA licensed HVAC professional — required for the refrigerant, electrical, and startup work, and to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eBravo Milano covers it with a \u003cstrong\u003e7-year compressor and 5-year parts\u003c\/strong\u003e limited warranty (with professional installation and registration).\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by the Bravo Milano \u003cstrong\u003e7-year compressor \/ 5-year parts\u003c\/strong\u003e limited warranty. 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It features a SEER2 rating of 24, operates effectively in temperatures as low as -13°F, and includes smart app control for convenient Wi-Fi management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the BRV-M42-230VO outdoor unit powers 3 independently controlled Bravo Milano indoor units (up to 5 max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones, each room on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24 SEER2\u003c\/strong\u003e inverter efficiency — cools and heats from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat pump — heats down to -13°F\u003c\/strong\u003e outdoor ambient\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR32 refrigerant\u003c\/strong\u003e, factory pre-charged; smart app control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e BRV-M42-230VO — Bravo Milano R32 multi-zone outdoor unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e BRV-M12WM-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e BRV-M12WM-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e BRV-M18WM-230VI (17,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — BRV-M42-230VO Outdoor Unit\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208–230V \/ 1 Ph \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Capacity (Range)\u003c\/td\u003e\n\u003ctd\u003e42,000 (range 8,350-46,000) Btu\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating Capacity (Range)\u003c\/td\u003e\n\u003ctd\u003e42,000 (range 8,450-53,000) Btu\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHSPF2 (Region IV)\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOP\u003c\/td\u003e\n\u003ctd\u003e3.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e32 A \/ 45 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003eup to 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e4,235 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e60 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e24.6 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e263 ft \/ 115 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e-13 to 125.6°F \/ -13 to 75.2°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e39.80 × 15.75 × 51.97 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e205.0 \/ 224.9 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official Bravo Milano multi-zone leaflet; combined-system capacity varies with the indoor-unit mix.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eBRV-M12WM-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eBRV-M12WM-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eBRV-M18WM-230VI\u003c\/td\u003e\n\u003ctd\u003e17,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this Bravo Milano system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system — the BRV-M42-230VO outdoor unit connects to 3 indoor units (12,000 BTU, 12,000 BTU, 17,000 BTU), each controlled independently, so it conditions 3 separate rooms or areas at once.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes — it is an inverter heat pump that both cools and heats, with rated heating down to -13°F outdoor ambient, so it works year-round in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR32 — an efficient single-component refrigerant. The system ships factory pre-charged; a licensed installer adjusts the charge for your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes. Choose a copper line-set kit length per zone at checkout, or supply your own.\u003c\/p\u003e\u003ch3\u003eWho should install it?\u003c\/h3\u003e\u003cp\u003eA licensed HVAC professional — required for the refrigerant, electrical, and startup work, and to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eBravo Milano covers it with a \u003cstrong\u003e7-year compressor and 5-year parts\u003c\/strong\u003e limited warranty (with professional installation and registration).\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by the Bravo Milano \u003cstrong\u003e7-year compressor \/ 5-year parts\u003c\/strong\u003e limited warranty. 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It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822116946165,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRW-NO","price":3257.55,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822116978933,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRW-16FT","price":3910.73,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822117011701,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRW-25FT","price":4076.62,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822117044469,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRW-50FT","price":4952.71,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-9k-12k-wall-mount-230v-r454b-735.webp?v=1786728643"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-12k-18k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 18,000 BTU, 12,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822117241077,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM18SRW-NO","price":3331.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822117273845,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM18SRW-16FT","price":4009.6,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822117306613,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM18SRW-25FT","price":4174.2,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822117339381,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM18SRW-50FT","price":5034.74,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-12k-18k-wall-mount-230v-r454b-259.webp?v=1786728429"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-12k-24k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+12k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 24,000 BTU, 12,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (24,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822117503221,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM24SRW-NO","price":3372.3,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822117535989,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM24SRW-16FT","price":4056.58,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822117568757,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM24SRW-25FT","price":4297.64,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822117601525,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM24SRW-50FT","price":5260.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-12k-24k-wall-mount-230v-r454b-737.webp?v=1786728600"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-18k-18k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 18,000 BTU, 18,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 18,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822117765365,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM18SRW-NO","price":3399.3,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822117798133,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM18SRW-16FT","price":4101.73,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822117830901,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM18SRW-25FT","price":4265.02,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822117863669,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM18SRW-50FT","price":5110.02,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-18k-18k-wall-mount-230v-r454b-150.webp?v=1786728550"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-18k-24k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+9k+18k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 24,000 BTU, 18,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (24,000 BTU, 18,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822117994741,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM24SRW-NO","price":3439.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822118027509,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM24SRW-16FT","price":4148.71,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822118060277,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM24SRW-25FT","price":4388.47,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822118093045,"sku":"OS-RMS42-230VOM09SRWM09SRWM18SRWM24SRW-50FT","price":5335.84,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-9k-18k-24k-wall-mount-230v-r454b-705.webp?v=1786728889"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-12k-12k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 12,000 BTU, 12,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822118224117,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRW-NO","price":3271.05,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822118256885,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRW-16FT","price":3924.23,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822118289653,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRW-25FT","price":4090.12,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822118322421,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRW-50FT","price":4966.21,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-12k-12k-12k-wall-mount-230v-r454b-556.webp?v=1786728402"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-12k-24k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+12k+12k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 24,000 BTU, 12,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (24,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822118519029,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM24SRW-NO","price":3379.05,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822118551797,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM24SRW-16FT","price":4063.33,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822118584565,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM24SRW-25FT","price":4304.39,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822118617333,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM24SRW-50FT","price":5267.32,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-12k-12k-24k-wall-mount-230v-r454b-668.webp?v=1786728587"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-18k-18k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+12k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 18,000 BTU, 18,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 18,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822118781173,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM18SRW-NO","price":3406.05,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822118813941,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM18SRW-16FT","price":4108.48,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822118846709,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM18SRW-25FT","price":4271.77,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822118879477,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM18SRW-50FT","price":5116.77,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-12k-18k-18k-wall-mount-230v-r454b-866.webp?v=1786728526"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-18k-24k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+12k+18k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 24,000 BTU, 18,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (24,000 BTU, 18,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822119239925,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM24SRW-NO","price":3446.55,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822119272693,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM24SRW-16FT","price":4155.46,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822119305461,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM24SRW-25FT","price":4395.22,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822119338229,"sku":"OS-RMS42-230VOM09SRWM12SRWM18SRWM24SRW-50FT","price":5342.59,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-12k-18k-24k-wall-mount-230v-r454b-962.webp?v=1786728386"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-18k-18k-18k","title":"OLMO Sierra 42,000 BTU 4-Zone 9k+18k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes 4 wall-mount zones with cooling capacities of 18,000 BTU, 18,000 BTU, 18,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (18,000 BTU, 18,000 BTU, 18,000 BTU, 9,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822119469301,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRWM18SRW-NO","price":3473.55,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822119502069,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRWM18SRW-16FT","price":4200.6,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822119534837,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRWM18SRW-25FT","price":4362.6,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822119567605,"sku":"OS-RMS42-230VOM09SRWM18SRWM18SRWM18SRW-50FT","price":5192.04,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-4-zone-9k-18k-18k-18k-wall-mount-230v-r454b-853.webp?v=1786728607"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-12k-12k-12k-24k","title":"OLMO 42,000 BTU 4-Zone 12k+12k+12k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System includes four wall-mount zones with a combined nominal total cooling capacity of 42,000 BTU, utilizing R454B refrigerant and offering optional Wi-Fi control for convenient temperature management. It features an outdoor unit model OS-RMS42-230VO, with three zones equipped with OS-RM12SW-230VI units providing 12,000 BTU cooling and one zone featuring an OS-RM24SW-230VI unit delivering 23,400 BTU cooling.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-RM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-RM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 23,400 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822119764213,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM24SRW-NO","price":3385.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822119796981,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM24SRW-16FT","price":4070.08,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822119829749,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM24SRW-25FT","price":4311.14,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822119862517,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM24SRW-50FT","price":5274.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-4-zone-42-000-btu-series-ductless-mini-split-ac-wall-mounted-539.webp?v=1773412956"},{"product_id":"4-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-12k-12k-18k-18k","title":"OLMO 42,000 BTU 4-Zone 12k+12k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 4-Zone Ductless Mini Split System features four wall-mount zones with combined cooling capacity of 42,000 BTU, using R454B refrigerant and optional Wi-Fi control. It includes two 12,000 BTU and two 18,000 BTU zones, paired with the OS-RMS42-230VO outdoor unit for efficient heating down to -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 4 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 4 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 4-zone system: the OS-RMS42-230VO outdoor unit connects to 4 wall-mount indoor units (12,000 BTU, 12,000 BTU, 18,000 BTU, 18,000 BTU), so it conditions 4 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822120026357,"sku":"OS-RMS42-230VOM12SRWM12SRWM18SRWM18SRW-NO","price":3412.8,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822120059125,"sku":"OS-RMS42-230VOM12SRWM12SRWM18SRWM18SRW-16FT","price":4115.23,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822120091893,"sku":"OS-RMS42-230VOM12SRWM12SRWM18SRWM18SRW-25FT","price":4278.52,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822120124661,"sku":"OS-RMS42-230VOM12SRWM12SRWM18SRWM18SRW-50FT","price":5123.52,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-4-zone-42-000-btu-series-ductless-mini-split-ac-wall-mounted-982.webp?v=1773412959"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-9k-9k-12k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+9k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822189035765,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM12SRW-NO","price":3492.45,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822189068533,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM12SRW-16FT","price":4308.93,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822189101301,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM12SRW-25FT","price":4516.29,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822189134069,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM12SRW-50FT","price":5611.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-9k-12k-wall-mount-230v-r454b-810.webp?v=1786728883"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-9k-9k-24k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+9k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 24,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (24,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822189625589,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM24SRW-NO","price":3600.45,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822189658357,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM24SRW-16FT","price":4448.03,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822189691125,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM24SRW-25FT","price":4730.56,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822189723893,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM09SRWM24SRW-50FT","price":5912.51,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-9k-24k-wall-mount-230v-r454b-211.webp?v=1786728786"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-9k-12k-18k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 18,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (18,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822190018805,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM18SRW-NO","price":3566.7,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822190051573,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM18SRW-16FT","price":4407.8,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822190084341,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM18SRW-25FT","price":4613.86,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822190117109,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM18SRW-50FT","price":5693.43,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-12k-18k-wall-mount-230v-r454b-127.webp?v=1786728561"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-9k-12k-24k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+12k+24k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 24,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (24,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e24,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (24,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822190280949,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM24SRW-NO","price":3607.2,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822190313717,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM24SRW-16FT","price":4454.78,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822190346485,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM24SRW-25FT","price":4737.31,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822190379253,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM12SRWM24SRW-50FT","price":5919.26,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-12k-24k-wall-mount-230v-r454b-509.webp?v=1786728614"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-9k-18k-18k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+9k+18k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 18,000 BTU, 18,000 BTU, 9,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (18,000 BTU, 18,000 BTU, 9,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822190674165,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRWM18SRW-NO","price":3634.2,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822190706933,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRWM18SRW-16FT","price":4499.92,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822190739701,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRWM18SRW-25FT","price":4704.69,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822190772469,"sku":"OS-RMS42-230VOM09SRWM09SRWM09SRWM18SRWM18SRW-50FT","price":5768.71,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-9k-18k-18k-wall-mount-230v-r454b-116.webp?v=1786728570"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-12k-12k-12k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 12,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822191263989,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM12SRW-NO","price":3505.95,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822191296757,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM12SRW-16FT","price":4322.43,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822191329525,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM12SRW-25FT","price":4529.79,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822191362293,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM12SRW-50FT","price":5624.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-12k-12k-12k-wall-mount-230v-r454b-266.webp?v=1786728578"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-9k-12k-12k-18k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+9k+12k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 18,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (18,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822191689973,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM18SRW-NO","price":3573.45,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822191722741,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM18SRW-16FT","price":4414.55,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822191755509,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM18SRW-25FT","price":4620.61,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822191788277,"sku":"OS-RMS42-230VOM09SRWM09SRWM12SRWM12SRWM18SRW-50FT","price":5700.18,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-9k-12k-12k-18k-wall-mount-230v-r454b-304.webp?v=1786728846"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-12k-12k-12k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+12k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 12,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822192312565,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM12SRW-NO","price":3512.7,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822192345333,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM12SRW-16FT","price":4329.18,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822192378101,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM12SRW-25FT","price":4536.54,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822192410869,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM12SRW-50FT","price":5631.66,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-12k-12k-12k-12k-wall-mount-230v-474.webp?v=1786728814"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-9k-12k-12k-12k-18k","title":"OLMO Sierra 42,000 BTU 5-Zone 9k+12k+12k+12k+18k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System includes 5 wall-mount zones with cooling capacities of 18,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU, and 9,000 BTU, paired with an outdoor unit OS-RMS42-230VO for a nominal total capacity of 42,000 BTU. It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (18,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822192836853,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM18SRW-NO","price":3580.2,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822192869621,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM18SRW-16FT","price":4421.3,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822192902389,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM18SRW-25FT","price":4627.36,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822192935157,"sku":"OS-RMS42-230VOM09SRWM12SRWM12SRWM12SRWM18SRW-50FT","price":5706.93,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-sierra-42-000-btu-5-zone-9k-12k-12k-12k-18k-wall-mount-230v-801.webp?v=1786728487"},{"product_id":"5-zone-42-000-btu-olmo-series-ductless-mini-split-ac-wall-mounted-12k-12k-12k-12k-12k","title":"OLMO 42,000 BTU 5-Zone 12k+12k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 5-Zone Ductless Mini Split System features five wall-mount zones, each with 12,000 cooling BTU, and uses R454B refrigerant for efficient operation. It includes an outdoor unit model OS-RMS42-230VO, supports optional Wi-Fi control, and operates down to -4°F for heating in cold climates.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 5 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 5 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 4 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 5 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 5-zone system: the OS-RMS42-230VO outdoor unit connects to 5 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU, 12,000 BTU), so it conditions 5 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit","offer_id":47822193098997,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRWM12SRW-NO","price":3519.45,"currency_code":"USD","in_stock":false},{"title":"16FT Installation Kit","offer_id":47822193131765,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRWM12SRW-16FT","price":4335.93,"currency_code":"USD","in_stock":false},{"title":"25FT Installation Kit","offer_id":47822193164533,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRWM12SRW-25FT","price":4543.29,"currency_code":"USD","in_stock":false},{"title":"50FT Installation kit","offer_id":47822193197301,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRWM12SRWM12SRW-50FT","price":5638.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/6914\/5280\/files\/olmo-5-zone-42-000-btu-series-ductless-mini-split-ac-wall-mounted-992.webp?v=1773414644"},{"product_id":"3-zone-42-000-btu-olmo-sierra-ductless-mini-split-ac-wall-mounted-9k-9k-12k","title":"OLMO Sierra 42,000 BTU 3-Zone 9k+9k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump","description":"\u003cp\u003eThe OLMO Sierra 3-Zone Ductless Mini Split System provides a nominal total cooling capacity of 42,000 BTU using R454B refrigerant, with three zones configured for wall-mount installation. It includes two 9,000 BTU zones and one 12,000 BTU zone, paired with the OS-RMS42-230VO outdoor unit and offers optional Wi-Fi control.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (12,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822290977013,"sku":"OS-RMS42-230VOM12SRWM09SRWM09SRW-NO\/NO\/NO","price":3022.65,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822291009781,"sku":"OS-RMS42-230VOM12SRWM09SRWM09SRW-NO\/NO\/16FT","price":3185.94,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822291042549,"sku":"OS-RMS42-230VOM12SRWM09SRWM09SRW-NO\/NO\/25FT","price":3227.41,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It uses R454B refrigerant, operates down to -4°F for heating, and includes optional Wi-Fi control for remote management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (18,000 BTU, 9,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822294417653,"sku":"OS-RMS42-230VOM18SRWM09SRWM09SRW-NO\/NO\/NO","price":3090.15,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822294450421,"sku":"OS-RMS42-230VOM18SRWM09SRWM09SRW-NO\/NO\/16FT","price":3253.44,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822294483189,"sku":"OS-RMS42-230VOM18SRWM09SRWM09SRW-NO\/NO\/25FT","price":3294.91,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It uses R454B refrigerant, includes an outdoor unit model OS-RMS42-230VO, and offers optional Wi-Fi control for remote management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 9,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822297891061,"sku":"OS-RMS42-230VOM24SRWM09SRWM09SRW-NO\/NO\/NO","price":3130.65,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822297923829,"sku":"OS-RMS42-230VOM24SRWM09SRWM09SRW-NO\/NO\/16FT","price":3293.94,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822297956597,"sku":"OS-RMS42-230VOM24SRWM09SRWM09SRW-NO\/NO\/25FT","price":3335.41,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It utilizes R454B refrigerant and offers optional Wi-Fi control, with a minimum heating ambient of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (12,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. 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It includes an outdoor unit model OS-RMS42-230VO, offers optional Wi-Fi control, and operates down to a minimum heating ambient temperature of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (18,000 BTU, 12,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822306083061,"sku":"OS-RMS42-230VOM18SRWM12SRWM09SRW-NO\/NO\/NO","price":3096.9,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822306115829,"sku":"OS-RMS42-230VOM18SRWM12SRWM09SRW-NO\/NO\/16FT","price":3260.19,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822306148597,"sku":"OS-RMS42-230VOM18SRWM12SRWM09SRW-NO\/NO\/25FT","price":3301.66,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It includes optional Wi-Fi control and operates down to a minimum heating ambient temperature of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 12,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822310441205,"sku":"OS-RMS42-230VOM24SRWM12SRWM09SRW-NO\/NO\/NO","price":3137.4,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822310473973,"sku":"OS-RMS42-230VOM24SRWM12SRWM09SRW-NO\/NO\/16FT","price":3300.69,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822310506741,"sku":"OS-RMS42-230VOM24SRWM12SRWM09SRW-NO\/NO\/25FT","price":3342.16,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It uses R454B refrigerant, offers optional Wi-Fi control, and operates down to a minimum heating ambient temperature of -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 18,000 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822313718005,"sku":"OS-RMS42-230VOM24SRWM18SRWM09SRW-NO\/NO\/NO","price":3204.9,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822313750773,"sku":"OS-RMS42-230VOM24SRWM18SRWM09SRW-NO\/NO\/16FT","price":3368.19,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822313783541,"sku":"OS-RMS42-230VOM24SRWM18SRWM09SRW-NO\/NO\/25FT","price":3409.66,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It includes an OS-RMS42-230VO outdoor unit with optional Wi-Fi control and operates effectively down to -4°F ambient temperatures.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-ARM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-ARM09SW-230VI (9,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-ARM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-ARM09SW-230VI\u003c\/td\u003e\n\u003ctd\u003e9,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 23,400 BTU, 9,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. 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It includes an outdoor unit OS-RMS42-230VO, offers optional Wi-Fi control, and is designed to operate efficiently in ambient temperatures as low as -4°F.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (12,000 BTU, 12,000 BTU, 12,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822321844469,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRW-NO\/NO\/NO","price":3036.15,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822321877237,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRW-NO\/NO\/16FT","price":3199.44,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822321910005,"sku":"OS-RMS42-230VOM12SRWM12SRWM12SRW-NO\/NO\/25FT","price":3240.91,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It includes an outdoor unit OS-RMS42-230VO, optional Wi-Fi control, and individual zones with cooling capacities of 23,400, 18,000, and 12,000 BTU.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 18,000 BTU, 12,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822325514485,"sku":"OS-RMS42-230VOM24SRWM18SRWM12SRW-NO\/NO\/NO","price":3211.65,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822325547253,"sku":"OS-RMS42-230VOM24SRWM18SRWM12SRW-NO\/NO\/16FT","price":3374.94,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822325580021,"sku":"OS-RMS42-230VOM24SRWM18SRWM12SRW-NO\/NO\/25FT","price":3416.41,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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Optional Wi-Fi control allows for remote temperature adjustments, with two zones offering 23,400 BTU cooling and one zone delivering 12,000 BTU cooling.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM12SW-230VI (12,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM12SW-230VI\u003c\/td\u003e\n\u003ctd\u003e12,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 23,400 BTU, 12,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822328824053,"sku":"OS-RMS42-230VOM24SRWM24SRWM12SRW-NO\/NO\/NO","price":3252.15,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822328856821,"sku":"OS-RMS42-230VOM24SRWM24SRWM12SRW-NO\/NO\/16FT","price":3415.44,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822328889589,"sku":"OS-RMS42-230VOM24SRWM24SRWM12SRW-NO\/NO\/25FT","price":3456.91,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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It includes an outdoor unit OS-RMS42-230VO with a nominal total capacity of 42,000 BTU and offers optional Wi-Fi control for convenience.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (18,000 BTU, 18,000 BTU, 18,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. 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It uses R454B refrigerant, operates effectively in temperatures as low as -4°F, and includes optional Wi-Fi control for remote management.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-zone system\u003c\/strong\u003e — the OS-RMS42-230VO outdoor unit powers 3 independently controlled wall-mount indoor units (rated for up to 5 zones); diameter adapters included, no branch boxes required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e42,000 BTU nominal capacity\u003c\/strong\u003e across 3 zones — each room set and run on its own remote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInverter heat pump\u003c\/strong\u003e — efficient variable-speed cooling and heating from one system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeats down to -4°F\u003c\/strong\u003e outdoor ambient — dependable cold-weather heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR454B refrigerant\u003c\/strong\u003e — next-generation lower-GWP (A2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Wi-Fi control\u003c\/strong\u003e and a remote included with each indoor unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eYour System Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor unit (condenser):\u003c\/strong\u003e OS-RMS42-230VO — R454B multi-zone outdoor unit, factory pre-charged for up to 125 ft of line, with line-set diameter adapters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 1 — Wall Mount:\u003c\/strong\u003e OS-RM24SW-230VI (23,400 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 2 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone 3 — Wall Mount:\u003c\/strong\u003e OS-RM18SW-230VI (18,000 Btu\/h) with remote control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-set kits\u003c\/strong\u003e — choose the copper line-set length per zone at checkout (or supply your own)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications — OS-RMS42-230VO Outdoor Unit (208\/230V)\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e208\/230V \/ 1 Ph \/ 60 Hz (voltage range 187–253V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant\u003c\/td\u003e\n\u003ctd\u003eR454B (A2L) — next-generation, lower-GWP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Charge (factory)\u003c\/td\u003e\n\u003ctd\u003e105.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEER2 (catalog)\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit MCA \/ Max. Fuse\u003c\/td\u003e\n\u003ctd\u003e36 A \/ 60 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Airflow\u003c\/td\u003e\n\u003ctd\u003e3,357 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Noise Level\u003c\/td\u003e\n\u003ctd\u003e64 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Connectable Indoor Units\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-charged Line Length\u003c\/td\u003e\n\u003ctd\u003e125 ft (add 0.16 oz\/ft beyond)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Line Length — Total \/ Per Indoor\u003c\/td\u003e\n\u003ctd\u003e262 ft \/ 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Height Difference (Indoor–Outdoor \/ Between Indoors)\u003c\/td\u003e\n\u003ctd\u003e49 ft \/ 25 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Range — Cooling \/ Heating\u003c\/td\u003e\n\u003ctd\u003e5 to 125°F \/ -4 to 75°F outdoor ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Dimensions (W×D×H)\u003c\/td\u003e\n\u003ctd\u003e38.38 × 32.88 × 14.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutdoor Unit Net \/ Gross Weight\u003c\/td\u003e\n\u003ctd\u003e172 \/ 194 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eOutdoor-unit specifications as printed in the official OLMO catalog and installation manual; combined-system capacity varies with the indoor-unit mix. Line sets are selected per zone by run length.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThis System’s Zones\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eIndoor Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCooling\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eOS-RM24SW-230VI\u003c\/td\u003e\n\u003ctd\u003e23,400 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eOS-RM18SW-230VI\u003c\/td\u003e\n\u003ctd\u003e18,000 Btu\/h\u003c\/td\u003e\n\u003ctd\u003eWall Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eHow many rooms can this OLMO Sierra system heat and cool?\u003c\/h3\u003e\u003cp\u003eThis is a 3-zone system: the OS-RMS42-230VO outdoor unit connects to 3 wall-mount indoor units (23,400 BTU, 18,000 BTU, 18,000 BTU), so it conditions 3 separate rooms or areas at once. Each indoor unit has its own remote and runs independently — set a different temperature in every room, or turn off the zones you are not using to save energy.\u003c\/p\u003e\u003ch3\u003eDoes it heat as well as cool?\u003c\/h3\u003e\u003cp\u003eYes. It is an inverter heat pump — it both cools in summer and heats in winter from the same system, with rated heating down to -4°F outdoor ambient, so no separate furnace is needed in most climates.\u003c\/p\u003e\u003ch3\u003eWhat refrigerant does it use?\u003c\/h3\u003e\u003cp\u003eR454B — a next-generation lower-GWP (A2L) refrigerant. The system ships factory pre-charged; a licensed installer tops off refrigerant based on your line length.\u003c\/p\u003e\u003ch3\u003eIs everything included, or do I need to buy line sets?\u003c\/h3\u003e\u003cp\u003eThe system includes the outdoor condenser, all indoor units, and their remotes; line-set diameter adapters are packed with the outdoor unit. Copper line sets for multi-zone systems are selected by run length per zone — choose the line-set kit length you need for each zone at checkout (or supply your own). Standard factory charge covers up to 125 ft of total line length.\u003c\/p\u003e\u003ch3\u003eCan I install it myself?\u003c\/h3\u003e\u003cp\u003eMulti-zone mini splits require a licensed HVAC professional for the refrigerant connections, electrical, and startup — professional installation is also required to keep the warranty valid. Many customers buy the equipment here and hire a local installer.\u003c\/p\u003e\u003ch3\u003eWhat warranty does it come with?\u003c\/h3\u003e\u003cp\u003eIt is backed by OLMO’s limited manufacturer warranty — \u003cstrong\u003e5-year compressor, 2-year parts, and 1-year remote\u003c\/strong\u003e. Coverage requires installation by a licensed HVAC contractor and product registration at olmo-comfort.com within 60 days of purchase.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\n\u003cp\u003eBacked by OLMO’s \u003cstrong\u003e5-year compressor \/ 2-year parts \/ 1-year remote\u003c\/strong\u003e limited warranty. Installation by a licensed HVAC professional and product registration at olmo-comfort.com within 60 days of purchase are required to keep coverage valid.\u003c\/p\u003e","brand":"OLMO","offers":[{"title":"No Installation Kit \/ No Installation Kit \/ No Installation Kit","offer_id":47822338195701,"sku":"OS-RMS42-230VOM24SRWM18SRWM18SRW-NO\/NO\/NO","price":3279.15,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 16FT Installation Kit","offer_id":47822338228469,"sku":"OS-RMS42-230VOM24SRWM18SRWM18SRW-NO\/NO\/16FT","price":3467.07,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 25FT Installation Kit","offer_id":47822338261237,"sku":"OS-RMS42-230VOM24SRWM18SRWM18SRW-NO\/NO\/25FT","price":3507.24,"currency_code":"USD","in_stock":false},{"title":"No Installation Kit \/ No Installation Kit \/ 50FT Installation 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