OLMO Sierra 18,000 BTU Indoor Wall Mount, 230V, R410A - Ductless Mini Split Air Conditioner Heat Pump
OLMO5-Yr WarrantySKU: OS-M18SRW-230VI
Product specifications
- Voltage
- 230V
- SEER
- 22.0
- WiFi
- Not Included
- Type
- Wall Mount
- Freon
R410A
Choose Your Configuration
“No Installation Kit” ships the units only.
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Fast Delivery
Ships from the nearest of our three US warehouses, leaves in 1–2 business days. Shipping policy
OLMO · SIERRA
Built for year-round comfort
OS-M18SRW-230VI
System Specs
| Cooling Capacity | 18,000 BTU/h |
|---|---|
| SEER2 | 22.0 |
| Voltage | 230V |
| Refrigerant | R410A |
| Compressor | Inverter |
|---|---|
| Sound Level (indoor) | 45/41/37 dB |
| Warranty | 5-Yr Compressor |
Indoor Unit Specs
| Unit Dimensions (WxDxH) | Net / Gross Weight |
|---|---|
| 48 × 12.63 × 9.25 in | 31.97 / 37.48 lb |
Sierra Series Description
The OLMO 18,000 BTU wall mount is a wall mount indoor unit for OLMO ductless mini split systems, running on R410A refrigerant. It mounts in a single room or zone and is controlled independently with its included remote — pair it with a compatible outdoor condenser to complete your system.
6 Modes for Maximum Comfort
Engineered to adapt to every season, every room, every need.
Maintain a comfortable indoor temperature by automatically switching between heating and cooling as needed. Ideal for year-round use.
WARRANTY
BACKED BY OLMO COMFORT
Industry-leading protection on every unit
Compressor: 5-year coverage
With product registration after professional installation.
Parts & components: 3-year coverage
All major components and refrigerant circuit parts.
Technical Specifications
Indoor Unit Specs— OS-M18SRW-230VI
| Model | OS-M18SRW-230VI |
|---|---|
| Unit Dimensions (WxDxH) | 48x12.63x9.25 in |
| Net/Gross Weight | 31.97/37.48 lb |
| Packing Dimensions (WxDxH) | 51.75x15.44x12.50 in |
| Power Supply | 208-230V, 1Ph, 60Hz |
| Noise Level (Hi/Med/Lo) | 45/41/37 dB |
Series Comparison Table
Technical specifications for every model in the series — this product is one of them.
Indoor Models
| Specification | OS-M18SRW-230VIThis model | OS-M09SRW-230VI | OS-M12SRW-230VI | OS-M24SRW-230VI |
|---|---|---|---|---|
| Power Supply V-Ph-Hz | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 |
| Capacity Btu/h | 18000 | 9000 | 12000 | 23400 |
| Rated Capacity Btu/h | 19000 | 9500 | 13000 | 26000 |
| Output Power W | 35 | 25 | 25 | 35 |
| Rated Current A | 0.17 | 0.11 | 0.11 | 0.17 |
| Indoor Air Flow CFM | 647 | 341 | 365 | 706 |
| Indoor Noise Level (Hi/Mi/Lo) dB(A) | 45/41/37 | 39/35/30 | 39/35/30 | 47/45/42 |
| Net Dimensions (WxHxD) in | 48x12.63x9.25 | 32.02x10.75x8.13 | 37.38x10.75x8.13 | 48x12.63x9.25 |
| Packing (WxHxD) in | 51.75x15.44x12.50 | 39.38x13.19x6.38 | 39.38x13.19x6.38 | 51.75x15.44x12.50 |
| Net/Gross Weight lbs | 31.97 / 37.48 | 19.84 / 24.25 | 19.84 / 24.25 | 31.97 / 37.48 |
| Liquid Side / Gas Side in | 1/4" / 1/2" | 1/4" / 3/8" | 1/4" / 3/8" | 3/8" / 5/8" |
Outdoor Models
| Specification | OS-MSR18-230VO | OS-MSR24-230VO | OS-MSR36-230VO | OS-MSR42-230VO |
|---|---|---|---|---|
| Power Supply V-Ph-Hz | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 | 208/230V-1Ph-60 |
| Capacity Btu/h | 18000 | 24000 | 32000 | 42000 |
| EER2 Btu/h | 12.5 | 12.5 | 12.5 | 10.5 |
| SEER2 Btu/h | 21.0 | 22.0 | 21.0 | 20.0 |
| Rated Capacity Btu/h | 18000 | 24000 | 36000 | 42000 |
| HSPF2 Btu/h | 9.50 | 9.05 | 9.00 | 8.95 |
| COP2 W/W | 3.45 | 3.66 | 3.37 | 3.17 |
| Minimum Circuit Ampacity A | 23 | 25 | 32.2 | 35 |
| Max Fuse A | 30 | 30 | 50 | 50 |
| Outdoor Air Flow (Hi) CFM | 1850 | 2350 | 3411 | 3411 |
| Outdoor Side Noise Level dB(A) | 55 | 55 | 59 | 63 |
| Dimensions (WxHxD) in | 33.88×26.38×12.25 | 37.38×33×13.38 | 37.38×41.38×13.38 | 37.38×41.38×13.38 |
| Outdoor Unit Packing (WxHxD) in | 39×17.75×28.75 | 43.75×18.13×36.25 | 43.75×18.13×47.25 | 43.75×18.13×47.25 |
| Net/Gross Weight lbs | 116.8/125.6 | 158.7/169.5 | 188.5/220.5 | 198.4/224.5 |
| Refrigerant Type/Quantity oz | R410A/63.49 | R410A/81.13 | R410A/105.82 | R410A/120 |
| Refrigerant Precharge ft | 50 | 75 | 98 | 98 |
| 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 | 66/197 | 66/246 | 66/262 |
| Outdoor (Cooling) °F | 14~114.8 | 14~114.8 | 14~114.8 | 14~114.8 |
| Outdoor (Heating) °F | -13~75.2 | -13~75.2 | -13~75.2 | -4~75.2 |
Frequently asked questions.
What size mini split do I need for my room?
For a room size of up to 850 sq ft, the Olmo Sierra 18,000 BTU mini split is an ideal choice. Its capacity makes it suitable for medium to large spaces, ensuring efficient cooling and heating.
Can I install the Olmo mini split myself?
While some homeowners may attempt a DIY installation, it's recommended to hire a professional for the Olmo Sierra 18,000 BTU system. This ensures optimal performance and compliance with local codes, especially since it requires a 230V electrical connection.
Does the Olmo mini split come pre-charged with refrigerant?
Yes, the Olmo Sierra mini split is pre-charged with R410A refrigerant for up to 25 ft of line set. This feature simplifies installation, but make sure to follow the manufacturer's guidelines for longer runs.
What voltage does the Olmo mini split require?
The Olmo Sierra 18,000 BTU mini split requires a voltage of 230V for proper operation. Ensure that your electrical system is compatible before installation.
What warranty does the Olmo Sierra mini split offer?
The Olmo Sierra comes with a 5-year parts and compressor warranty, providing peace of mind for your investment. This warranty covers key components, ensuring long-term reliability.
What is the SEER rating of the Olmo mini split, and is it efficient?
The Olmo Sierra boasts an impressive SEER rating of 22.0, making it a highly efficient choice for both cooling and heating. This efficiency can lead to significant energy savings over time.
Manufacturer Technical Support
Reach your brand's tech support team directly
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The OLMO 18,000 BTU wall mount is a wall mount indoor unit for OLMO ductless mini split systems, running on R410A refrigerant. It mounts in a single room or zone and is controlled independently with its included remote — pair it with a compatible outdoor condenser to complete your system.
Key Features
- Wall Mount indoor unit for OLMO multi-zone / single-zone systems
- 18,000 BTU nominal capacity
- Individually controlled with included remote — set its own temperature per room
- R410A refrigerant
- Inverter heat pump — cools and heats when paired with a compatible condenser
Works With
Connects to a compatible OLMO outdoor condenser (multi-zone or single-zone), sold separately. Choose a copper line-set kit length at checkout, or supply your own.