OLMO Sierra 12,000 BTU Single Zone Wall Mount, 115V, R32 - Ductless Mini Split Air Conditioner Heat Pump | FACTORY
OLMO5-Yr Warranty339 shoppers interested
Product specifications
| Brand | |
|---|---|
| Voltage | |
| SEER | |
| WiFi | |
| Zone | |
| Type | |
| Freon | |
| Compressor |
Every system includes a 16 ft installation kit inside the factory box. Selecting 25 ft or 50 ft orders a separate, longer kit — it does not replace the included 16 ft kit.
Please note that all delivery dates and estimated transit times are approximate and are not guaranteed. Delivery times may vary due to carrier delays, weather, holidays, peak shipping periods, or other circumstances beyond our control. How delivery dates are calculated
Pickup currently unavailable at Medley Warehouse
Questions about this system?
Answers in seconds — tap a question below
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Sized for about 300–500 sq ft. Rule of thumb: ~20 BTU per sq ft, and 12,000 BTU = 1 ton (this unit is 12,000 BTU (1-ton)). Ceiling height, insulation, sun and climate shift that — if you're between sizes, size up for hot/humid rooms. Not sure? We'll confirm the right BTU for your space.
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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 12,000 BTU (1-ton). BTU tells you the capacity; SEER2 tells you the efficiency.
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It uses R32 — an efficient, lower-GWP refrigerant that's now the industry standard on modern mini splits. 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.
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Rated SEER2 18.0 — 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.
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Runs on 115V — plugs into a standard household circuit, so no special high-voltage wiring is needed in most homes. That makes it easy to add to a bedroom, garage, office or addition without a costly electrical upgrade. Your installer still handles the final hookup and dedicated breaker.
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Yes — a big upgrade. It's far more efficient (inverter, SEER2 18.0) 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.
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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.
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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.
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Ships as a complete set: OS-SR12-115VO, OS-12SRW-115VI. Everything arrives together — check the photos and specs for the full kit.
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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.
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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
Sleek Wall-Mount Design
A slim, quiet indoor head mounts high on the wall and delivers 12000 BTU of heating & cooling — modern looks with whisper-quiet operation.
Inverter Efficiency — SEER2 18
A variable-speed inverter compressor ramps to match the load instead of cycling on/off, holding SEER2 18 on 115V — steady comfort with noticeably lower energy bills.
Right-Sized Coverage
Engineered to heat & cool up to 300–500 sq ft — matched capacity so you never over- or under-size the space.
Sierra Wall Mount
OLMO's Single-Zone Sierra Series is a versatile HVAC solution designed to provide efficient heating and cooling for multiple rooms. Equipped with advanced inverter technology, these units deliver precise temperature control and significant energy savings. Using eco-friendly R32 refrigerant, the system ensures reliable performance with minimal environmental impact. Perfect for residential or commercial applications, the Sierra Series offers quiet operation, flexible installation, and user-friendly controls, making it an ideal 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 Single-Zone Sierra Series delivers efficient multi-room comfort with advanced inverter technology for precise temperature control. Its eco-friendly R32 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 Unit Specs
| Model | OS-12SRW-115VI |
|---|---|
| Net/Gross Weight | 18.5/23.1 lb |
| Power Supply | 115V, 1Ph, 60Hz |
| Maximum Fuse Size | 25 A |
| Min. Circuit Ampacity | 15.6 A |
| Copper Line Size (Liquid/Gas) | 1/4"/3/8" |
| Noise Level (Hi/Med/Lo) | 42/39/37/35 dB |
| Airflow (Turbo/Hi/Mi/Lo) | 365/394/365/312/253 CFM |
| Dehumidification | 2.7 pt/h |
| Drain Pipe Diameter | 3/4" |
| Controller | L1-12 |
Outdoor Unit Specs
| Model | OS-SR12-115VO |
|---|---|
| Net/Gross Weight | 57.3/66.1 lb |
| Power Supply | 115V, 1Ph, 60Hz |
| Maximum Fuse Size | 25 A |
| Min. Circuit Ampacity | 15.6 A |
| Copper Line Size (Liquid/Gas) | 1/4"/3/8" |
| Noise Level | 53 dB |
| Airflow | 488 CFM |
| Dehumidification | 2.53 pt/h |
System Specs
| Cooling Capacity | 12,000 BTU |
|---|---|
| SEER2 | 18 |
| Zones | 1 |
| Voltage | 115V |
| Refrigerant Type | R32 |
| Copper Line Length | 16.4 ft |
| Compressor | Inverter |
| WiFi | Included |
| Heating Capacity | 12,000 (3,400~12,500) BTU/h |
| Cooling Capacity Range | 12,000 (4640~12500) BTU/h |
| Max. Pipe Length | 65.6 ft |
| Refrigerant Precharge | 24.6 ft |
| Max Height Difference | 49.2 ft |
| COP | 3.4 |
Series Comparison Table
Technical specifications for every model in the Sierra series — this product is one of them.
| Indoor Model | OS-09SRW-115VI | OS-12SRW-115VI | OS-09SRW-230VI | OS-12SRW-230VI | OS-18SRW-230VI | OS-24SRW-230VI | OS-R36SRW-230VI |
|---|---|---|---|---|---|---|---|
| Outdoor Model | OS-SR09-115VO | OS-SR12-115VO | OS-SR09-230VO | OS-SR12-230VO | OS-SR18-230VO | OS-SR24-230VO | OS-RSR36-230VO |
| Power Supply | 115V-1Ph-60 | 115V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 |
| Capacity | 9000 | 12000 | 9000 | 12000 | 18000 | 24000 | 34500 |
| Cooling | |||||||
| EER2 | 12.5 | 10.2 | 12.95 | 11.1 | 11.95 | 10.6 | 9.4 |
| SEER2 | 20.0 | 18.0 | 22.5 | 20.0 | 21.0 | 19.5 | 20.0 |
| Rated Capacity | 9500 | 12000 | 9000 | 12000 | 18000 | 24000 | 35000 |
| Heating | |||||||
| HSPF4 | 9.0 | 8.5 | 8.5 | 8.5 | 9.8 | 8.5 | 8.4 |
| HSPF5 | 7.0 | 8.0 | 8.0 | 8.0 | 9.0 | 8.0 | 8.2 |
| COP2 | 4.1 | 3.4 | 4.12 | 3.5 | 3.91 | 3.3 | 3.2 |
| Minimum Circuit Ampacity | 14.6 | 15.6 | 9.5 | 9.5 | 14.5 | 21 | 26.8 |
| Max Fuse | 25 | 25 | 15 | 15 | 20 | 35 | 35 |
| Indoor Air Flow (Turbo/Hi/Mi/Lo/Si) | 353/382/341/294/247 | 365/394/365/312/253 | 353/382/341/294/247 | 365/394/365/312/253 | 647/647/588/482/382 | 706/706/647/559/441 | 706/706/647/559/441/647 |
| Indoor Noise Level (Turbo/Hi/Mi/Lo) | 42/39/37/35 | 42/39/37/35 | 42/39/37/35 | 42/39/37/35 | 48/45/41/39 | 50/48/43/41 | 50/47/43/39 |
| Indoor Unit | |||||||
| Dimensions (WxDxH) | 33.5x10.62x8.19 | 33.5x10.62x8.19 | 33.5x10.62x8.19 | 33.5x10.62x8.19 | 42.5x12.37x9 | 42.5x12.37x9 | 52.75x14.83x10.81 |
| Packing (WxDxH) | 35.87x13.13x10.25 | 35.87x13.13x10.25 | 35.87x13.13x10.25 | 35.87x13.13x10.25 | 48x15.75x12.19 | 48x15.75x12.19 | 56.12x15.56x18.12 |
| Net/Gross Weight | 18.5/23.1 | 18.5/23.1 | 18.5/23.1 | 18.5/23.1 | 30.9/37.5 | 29.8/37.5 | 40.8 |
| Outdoor Unit | |||||||
| Outdoor Air Flow (Hi) | 470 | 488 | 470 | 488 | 588 | 647 | 647 |
| Outdoor Side Noise Level | 53 | 53 | 53 | 53 | 58 | 60 | 60 |
| Dimensions (WxDxH) | 28.13×21.25×9.5 | 28.13×21.25×9.5 | 28.13×21.25×9.5 | 28.13×21.25×9.5 | 31.88x23x11 | 33.88×25.5×12.2 | 35.43x13.38x29.5 |
| Packing (WxDxH) | 32.67x23.62x13.18 | 32.67x23.62x13.18 | 32.67x23.62x13.18 | 32.67x23.62x13.18 | 37x25.19x15.15 | 39.17×28.34×16.53 | 41.75x17.69x32.31 |
| Net/Gross Weight | 52.9/61.7 | 57.3/66.1 | 48.5/57.3 | 52.9/61.7 | 75/82.7 | 101.4/110.2 | 121.3 |
| Refrigerant | |||||||
| Refrigerant Type/Quantity | R32/21.2 | R32/21.9 | R32/20.5 | R32/21.9 | R32/45.9 | R32/47.6 | R32/72.4 |
| Refrigerant Precharge | 24.6 | 24.6 | 24.6 | 24.6 | 24.6 | 24.6 | 24.6 |
| Design Pressure | 620 | 620 | 620 | 620 | 620 | 620 | 620 |
| Liquid Side / Gas Side | 1/4'' / 3/8'' | 1/4'' / 3/8'' | 1/4'' / 3/8'' | 1/4'' / 3/8'' | 1/4'' / 1/2'' | 3/8'' / 5/8'' | 3/8'' / 5/8'' |
| Refrigerant Piping | |||||||
| Max Refrigerant Pipe Length | 65.6 | 65.6 | 65.6 | 65.6 | 98.4 | 98.4 | 98.4 |
| Max. Difference in Level | 49.2 | 49.2 | 49.2 | 49.2 | 49.2 | 49.2 | 49.2 |
| Ambient Temperature | |||||||
| Indoor (Cooling/Heating) | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 |
| Outdoor (Cooling/Heating) | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 | 5~118/-5~75 |
| Energy Star Certified | ✓ | ✓ | ✓ | ||||
What’s Included
| Outdoor condenser | OS-SR12-115VO |
|---|---|
| Indoor unit | OS-12SRW-115VI |
| Remote controller | L1-12 |
Installation kit is not included in the selected option — pick 16ft, 25ft or 50ft above to add one.
Shipping & Returns
- Free shipping on every order over $300.
- Delivery estimate for your ZIP is shown in the buy box above.
- Returns accepted per our policy — unopened units in original packaging.
Warranty
5-year manufacturer warranty
- Limited manufacturer warranty on the compressor and sealed system components.
- Your order number is the proof of purchase — keep it for any claim.
Multiple Control Methods
Olmo’s Sierra can be managed with a user-friendly remote control. This options offer precise temperature adjustments and optimal climate control for ultimate convenience.
Compare with similar items
Frequently Asked Questions
What size mini split do I need for my room?
For optimal performance, the Olmo 12,000 BTU mini split is suitable for spaces up to 550 sq ft. This makes it ideal for small to medium-sized rooms, ensuring efficient cooling and heating.
Can I install the Olmo mini split myself?
Yes, you can install the Olmo 12,000 BTU mini split yourself if you have basic HVAC knowledge. However, ensure you purchase the appropriate installation kit, available in lengths up to 50 ft, to facilitate the installation process.
Does the Olmo mini split come pre-charged with refrigerant?
Yes, the Olmo 12,000 BTU mini split arrives pre-charged with R32 refrigerant for up to 25 ft of line set. This feature simplifies installation and ensures effective operation right out of the box.
What voltage does the Olmo mini split require?
The Olmo 12,000 BTU ductless mini split operates on a standard 115V power supply. This voltage requirement makes it compatible with most residential electrical systems.
What warranty does the Olmo mini split offer?
The Olmo 12,000 BTU mini split comes with a comprehensive 5-year parts and compressor warranty. This warranty provides peace of mind and assurance of quality performance.
What SEER rating does the Olmo mini split have?
The Olmo 12,000 BTU mini split boasts an impressive SEER rating of 18.0, indicating its high energy efficiency. This rating means lower energy bills and a reduced environmental impact, making it a smart choice for heating and cooling.
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