OLMO 36,000 BTU 4-Zone 9k+12k+12k+12k Wall Mount, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump | No Kit
OLMO5-Yr Warranty
Product specifications
| Brand | |
|---|---|
| Voltage | |
| SEER | |
| WiFi | |
| Zone | |
| Type | |
| Freon | |
| Compressor |
Pickup currently unavailable at 3550 Northwest 113th Court
Questions about this system?
Answers in seconds — tap a question below
-
Covers about 1400–1800 sq ft total, split across its indoor units — each head handles its own room, so you put the right capacity where you need it. Rule of thumb: ~20 BTU per sq ft, and 12,000 BTU = 1 ton (this system is 36,000 BTU (3-ton)). Want help splitting the zones? Our team can map it out.
-
12,000 BTU = 1 ton — "tons" is just the older way of stating capacity. So 24,000 BTU = 2 tons, 36,000 = 3 tons, and so on. This system is 36,000 BTU (3-ton). BTU tells you the capacity; SEER2 tells you the efficiency.
-
It uses R454B — the newest low-GWP eco refrigerant, so it's future-proof and efficient. The outdoor unit ships pre-charged for a standard line set, so most installs need no extra refrigerant; your licensed, EPA-608-certified installer verifies the charge and tops it off if your line set is longer.
-
Rated SEER2 21.0 — a strong efficiency number, and the higher it is the lower your energy bills. Its inverter compressor ramps up and down instead of cycling on/off, so it holds the temperature steadily, runs quietly, and uses less power than a standard AC or window unit.
-
Needs a dedicated 230V circuit, like a large household appliance, so it can deliver full capacity to larger rooms and multi-zone setups. Your licensed HVAC installer or electrician sets up the correct breaker and disconnect to meet local electrical code.
-
Yes — a big upgrade. It's far more efficient (inverter, SEER2 21.0) and much quieter, since the compressor sits outside instead of in your window or on the floor. It mounts permanently, doesn't block a window, and heats as well as cools year-round. Higher upfront cost, but lower bills and a longer lifespan.
-
Yes to all three. It's an inverter heat pump — cools in summer, heats in winter (even in the cold), far more efficiently than electric heaters. A Dry mode also pulls out humidity, so rooms feel cooler and less muggy.
-
Yes. Each indoor unit has its own remote/thermostat — set different temperatures or turn one off, so you only condition the rooms you use and save energy on the ones you're not. One outdoor unit powers them all, keeping install and running costs lower than separate systems per room.
-
Yes — WiFi is included, so you can set schedules, change the temperature, and even turn it on before you get home, all from the mobile app (and pair it with voice assistants). A standard remote is included too.
-
Ships as a complete set: OS-RMS36-230VO, OS-RM12SW-230VI, OS-RM12SW-230VI, OS-RM12SW-230VI, OS-RM09SW-230VI. Everything arrives together — check the photos and specs for the full kit.
-
It should be installed by a licensed, EPA-608-certified HVAC professional — we don't recommend DIY installation. Handling refrigerant requires EPA Section 608 certification under U.S. law, and professional installation keeps the system safe, code-compliant, and your manufacturer warranty valid.
-
Yes — you get full inverter heat-pump technology and the same core features as premium brands without paying for the name, which is how we keep prices low. Shipping is free on U.S. orders over $300, and our team can help with sizing and support.
Why buy this mini split from MiniSplitsForLess
- Free Shipping over $300Ships free to the lower 48 states — flat rate, no surprises at checkout.
- USA-Based Expert SupportReal U.S. HVAC pros help with BTU sizing, refrigerant and install questions.
- Genuine Units & Full WarrantyBrand-new, authorized-dealer equipment backed by the full manufacturer warranty.
- Fast Nationwide ShippingIn stock and ready to ship from U.S. warehouses across all 48 states.
What Stands Out
Complete 4-Zone System
Heat or cool 4 rooms independently from one 36000 BTU outdoor unit (9K+12K+12K+12K) — every zone sets its own temperature, delivered by wall mount indoor units.
Inverter Efficiency — SEER2 21
A variable-speed inverter compressor ramps to match the load instead of cycling on/off, holding SEER2 21 on 230V — steady comfort with noticeably lower energy bills.
Right-Sized Coverage
Engineered to heat & cool up to 1400–1800 sq ft across 4 zones — matched capacity so you never over- or under-size the space.
Sierra Wall Mount
OLMO's Multi-Zone Sierra Series is a versatile HVAC solution that provides efficient heating and cooling for multiple rooms, featuring advanced inverter technology for precise temperature control and significant energy savings. Using eco-friendly R410A refrigerant, the system delivers reliable performance with minimal environmental impact. Ideal for both residential and commercial applications, the Sierra Series combines quiet operation, flexible installation, and user-friendly controls, making it a perfect choice for maintaining year-round comfort across multiple zones with one efficient system.
Warranty and Tech Support Info
By selecting OLMO products for your home or business, you’ll receive expert technical support from heating and cooling specialist, including access to product manuals, troubleshooting guides and warranty information.
The manufacturer provides a Limited Warranty of 5 years for the compressor and 2 years for parts.
Warranty terms
Main Features
OLMO's Multi-Zone Sierra Series delivers efficient multi-room comfort with advanced inverter technology for precise temperature control. Its eco-friendly R454B refrigerant reduces environmental impact, while quiet operation ensures minimal disruption. With flexible installation options, sleek design, and reliable heating and cooling, it’s the perfect solution for modern multi-zone climate control needs.
All Accessories Included
With your purchase, you receive a comprehensive MiniSplit system. MiniSplits4Less ensures you have everything needed for a seamless installation. Your package includes an Indoor Unit, Outdoor Unit, Remote Control, Manuals, a 16ft Line Set, and a Smartkit (WIFI). We've meticulously thought of every detail to provide you with all the essentials for your installation.
Technical Specifications
| Indoor Models | OS-RM09SW-230VI | OS-RM12SW-230VI | OS-RM18SW-230VI | OS-RM24SW-230VI |
|---|---|---|---|---|
| Power Supply (V-Ph-Hz) | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 |
| Cooling Capacity (Btu/h) | 9000 | 12000 | 18000 | 23400 |
| Heating Rated Capacity (Btu/h) | 9500 | 13000 | 19000 | 26000 |
| Output Power (W) | 25 | 25 | 35 | 35 |
| Rated Current (A) | 0.11 | 0.11 | 0.17 | 0.17 |
| Indoor Air Flow (CFM) | 341 | 365 | 647 | 706 |
| Indoor Noise Level (Hi/Mi/Lo) (dB(A)) | 39/35/30 | 39/35/30 | 45/41/37 | 47/45/42 |
| Net Dimensions (WxHxD) (in) | 32.02x10.75x8.13 | 37.38x10.75x8.13 | 48x12.63x9.25 | 48x12.63x9.25 |
| Packing (WxHxD) (in) | 39.38x13.19x6.38 | 39.38x13.19x6.38 | 51.75x15.44x12.50 | 51.75x15.44x12.50 |
| Net/Gross Weight (lbs) | 19.84 / 24.25 | 19.84 / 24.25 | 31.97 / 37.48 | 31.97 / 37.48 |
| Refrigerant Piping (Liquid Side / Gas Side) (in) | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 1/2" | 3/8" / 5/8" |
| Outdoor Models | OS-RMS18-230VO | OS-RMS24-230VO | OS-RMS36-230VO | OS-RMS42-230VO |
|---|---|---|---|---|
| Power Supply (V-Ph-Hz) | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 |
| Cooling Capacity (Btu/h) | 18000 | 27000 | 36000 | 42000 |
| EER2 | 13.33 | 12.85 | 12.85 | 12.0 |
| SEER2 | 22.0 | 23.0 | 22.0 | 22.0 |
| Heating Rated Capacity (Btu/h) | 18000 | 27000 | 36000 | 36000 |
| HSPF2 | 10.0 | 10.0 | 10.0 | 9.5 |
| COP2 (W/W) | 3.82 | 3.60 | 3.91 | 3.60 |
| Max Fuse (A) | 30 | 40 | 50 | 60 |
| Outdoor Air Flow (Hi) (CFM) | 1850 | 3357 | 3357 | 3357 |
| Outdoor Side Noise Level (dB(A)) | 55 | 62 | 64 | 64 |
| Dimensions (WxHxD) (in) | 33.88x26.38x12.25 | 38.38x32.88x14.12 | 38.38x32.88x14.12 | 38.38x32.88x14.12 |
| Outdoor Unit Packing (WxHxD) (in) | 39x28.75x17.75 | 43.75x37.75x18.12 | 43.75x37.75x18.12 | 43.75x37.75x18.12 |
| Net/Gross Weight (lbs) | 101.4/112.4 | 160.6/183.2 | 169.8/191.8 | 172/194 |
| Refrigerant Type/Quantity (oz) | R454B/51.15 | R454B/76.2 | R454B/105.8 | R454B/105.8 |
| Refrigerant Piping (Liquid Side / Gas Side) (in) | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" |
| Max Refrigerant Pipe Length Each/Total (ft) | 82/164 | 82/230 | 82/230 | 82/262 |
| Ambient Outdoor (Cooling) (°F) | 5~125 | 5~125 | 5~125 | 5~125 |
| Ambient Outdoor (Heating) (°F) | -13~75 | -13~75 | -13~75 | 4~75 |
Multiple Control Methods
Olmo’s Multi-Zone Sierra Series can be managed with a user-friendly remote control and the. This options offer precise temperature adjustments and optimal climate control for ultimate convenience.
Frequently Asked Questions
How many rooms can the Olmo 36,000 BTU mini split cool?
The Olmo 4 Zone 36,000 BTU mini split is designed to effectively cool up to four rooms, making it ideal for multi-zone applications. With a coverage area of up to 1500 sq ft, you can comfortably manage multiple living spaces.
Can I mix BTU sizes with the Olmo mini split system?
Yes, you can mix BTU sizes with the Olmo 36,000 BTU system, allowing you to customize the cooling capacity for different zones. For instance, you could pair a 9k BTU unit with three 12k BTU units, providing flexibility based on your room sizes.
Do all zones run simultaneously in the Olmo mini split system?
In the Olmo 36,000 BTU multi-zone system, all zones can run simultaneously, ensuring that each area receives the desired cooling or heating. This feature allows for tailored comfort throughout your home.
What is the efficiency of the Olmo mini split compared to multiple single-zone units?
The Olmo 36,000 BTU system boasts a SEER rating of 21.0, which provides superior efficiency compared to operating multiple single-zone units. This high efficiency can lead to lower energy bills and a reduced environmental impact.
What warranty does the Olmo mini split offer?
The Olmo 36,000 BTU mini split comes with a 5-year parts and compressor warranty, ensuring peace of mind for your investment. This warranty covers essential components, providing reliable support for your cooling needs.
Does the Olmo mini split come pre-charged with refrigerant?
Yes, the Olmo 36,000 BTU mini split is pre-charged with R454B refrigerant, suitable for line sets of up to 25 ft. This feature simplifies installation, allowing for a quicker setup process.
Latest News
If you're thinking about turning your home into a smart home, you're not alone.
Mini Split AC Delivery & Wholesale Terms: Shipping Times for Contractors
B2B Logistics & Freight Mini Split AC Delivery & Wholesale Terms: Shipping Times, Freight Costs & Contractor Bulk Pricing (2026)...
Mini Split Sale & Clearance Deals: Discounted Heat Pumps
Sale & Clearance Mini Split Sale & Clearance Guide: How to Find Genuine Discounts Live Markdowns Factory-Sealed Stock Fast Shipping...
Small Mini Split Dimensions: Exact Wall Clearances for Tight Spaces
Measured Guide 2026 Compact Mini Split Installs: Verified Clearance Specs for Tight Walls When inches matter, Minisplitsforless.com delivers exact clearances...
