| Refrigerant type | R32 |
| System type | Single Zone unit |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.8 |
| Voltage range (V) | DC 310V |
| Controller | L1-12 |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 11.95 |
| SEER2 | 21 |
| Net/gross weight (lb) | 30.9/37.5 |
| Unit dimensions (WxDxH) | 42 1/2x12 3/8x9 |
| Packing dimensions (WxDxH) | 48x15 3/4x12 3/16 |
| Operation range - heating | -5-75 |
| Operation range - cooling | 5-118 |
| Minimum circuit ampacity (A) | 14.5 |
| Max fuse (A) | 20 |
| Indoor noise level (H/M/L) | 48/45/41/39 |
| Indoor air flow | 647/647/588/482/382 |
| Drainage pipe diameter (inch) | 3/4" |
Overview
The OS-18SRW-230VI is the 18,000 Btu/h indoor wall-mounted unit from OLMO's Sierra Series, a single-zone mini split system using R32 refrigerant. Smart Connect lets you control the unit from anywhere via the OLMO app, and the system is compliant with the A2L refrigerant transition.
This 208-230V, 1Ph, 60Hz unit is rated up to 21 SEER2 with an EER2 of 11.95, delivering 18,000 Btu/h. It pairs one-to-one with the matching OS-SR18-230VO outdoor condenser.
Features
- Smart Connect from anywhere via smartphone app
- Self Clean Mode
- Turbo Mode
- Multiple Fan Speeds
- Remote Control
- ECO Mode
What's Included
- OS-18SRW-230VI indoor wall-mounted unit
- Designed to pair one-to-one with the OS-SR18-230VO outdoor condenser (sold separately)
Specifications
| Refrigerant type | R32 |
| System type | Single Zone unit |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.8 |
| Voltage range (V) | DC 310V |
| Controller | L1-12 |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 11.95 |
| SEER2 | 21 |
| Net/gross weight (lb) | 30.9/37.5 |
| Unit dimensions (WxDxH) | 42 1/2x12 3/8x9 |
| Packing dimensions (WxDxH) | 48x15 3/4x12 3/16 |
| Operation range - heating | -5-75 |
| Operation range - cooling | 5-118 |
| Minimum circuit ampacity (A) | 14.5 |
| Max fuse (A) | 20 |
| Indoor noise level (H/M/L) | 48/45/41/39 |
| Indoor air flow | 647/647/588/482/382 |
| Drainage pipe diameter (inch) | 3/4" |
Details
Overview
The OS-18SRW-230VI is the 18,000 Btu/h indoor wall-mounted unit from OLMO's Sierra Series, a single-zone mini split system using R32 refrigerant. Smart Connect lets you control the unit from anywhere via the OLMO app, and the system is compliant with the A2L refrigerant transition.
This 208-230V, 1Ph, 60Hz unit is rated up to 21 SEER2 with an EER2 of 11.95, delivering 18,000 Btu/h. It pairs one-to-one with the matching OS-SR18-230VO outdoor condenser.
Features
- Smart Connect from anywhere via smartphone app
- Self Clean Mode
- Turbo Mode
- Multiple Fan Speeds
- Remote Control
- ECO Mode
What's Included
- OS-18SRW-230VI indoor wall-mounted unit
- Designed to pair one-to-one with the OS-SR18-230VO outdoor condenser (sold separately)
Manuals
Frequently Asked Questions
Who do you sell to?
We sell exclusively to licensed HVAC contractors and industry professionals. Professional installation by a licensed technician is recommended to ensure proper installation, system performance, code compliance, and maximum manufacturer warranty coverage.
What brands do you carry?
We specialize in high performance brands like Cooper and Hunter along with ductless and mini split systems that meet California low GWP and energy compliance standards. We also stock trusted installation and service brands including NAVAC, RectorSeal, Fieldpiece, Armbridge, Olmo, and Diversitech.
Do you stock equipment locally?
Yes. We have a ton of equipment and accessories in stock across the Bay Area and Sacramento, available for local pickup or freight shipping. More locations coming soon.
Can I get help sizing a system?
Absolutely. We help contractors with equipment selection, line set sizing, refrigerant matchups, and other technical questions. Reach out via phone or email for support.
Do you offer volume discounts?
Yes. We offer contractor pricing and volume breaks for bulk orders. Reach out directly if you're planning a multi-unit install or need project pricing.
Do you help with warranty claims?
Yes, you will need to first reach out to the Cooper & Hunter Technical Support line 1 800-977-0722 to go through troubleshooting, and if it is determined to be a defective unit, we will work with the manufacturer and you as the customer to source you a replacement unit under warranty. If it is determined to need replacement parts, you as the customers will work with Cooper & Hunter to source replacement parts.
Can I buy online?
Yes. As long as you have a licensed contractor account with us, you can place orders online for delivery or pickup at any of our branch locations.
What makes CoolMan different?
We’re not just a supplier — we’re a partner. We know the ductless business, we understand California codes, and we move fast to help you win jobs and keep clients happy.
