| Refrigerant type | R454B |
| Power source | 208-230V, 1Ph, 60Hz |
| Voltage range (V) | 187-253 |
| EER2 | 12.0 |
| SEER2 | 22.0 |
| Net/gross weight (lb) | 172/194 |
| Unit dimensions (WxDxH) | 38-3/8x32-7/8x14-1/8 |
| Packing dimensions (WxDxH) | 43-3/4x37-3/4x18-1/8 |
| Operation range - heating | -4~75 |
| Operation range - cooling | 5~125 |
| Minimum circuit ampacity (A) | 36 |
| Max fuse (A) | 60 |
| HSPF2 [catalog] | 9.5 |
| COP2 [catalog] | 3.60 |
| Cooling Capacity (nominal) (Btu/h) [catalog] | 42,000 |
| Heating Rated Capacity (Btu/h) [catalog] | 36,000 |
| Outdoor Air Flow (Hi) (CFM) [catalog] | 3357 |
| Outdoor Side Noise Level (dB(A)) [catalog] | 64 |
| Refrigerant Charge (oz) [catalog] | 105.8 |
| Max Refrigerant Pipe Length (Each/Total ft) [catalog] | 82/262 |
Overview
The OS-RMS42-230VO is a 42,000 Btu/h outdoor unit from OLMO's Multi-Sierra Series, a heat pump with inverter technology that can be combined with OLMO Multi-Sierra wall-mounted indoor units in up to 4 independent zones.
This 208-230V, 1Ph, 60Hz unit uses R454B refrigerant, measures 38-3/8x32-7/8x14-1/8 in, and weighs 172/194 lb net/gross.
Features
- Inverter technology heat pump
- Supports up to 4 independent indoor zones
- Smart Connect compatible with paired indoor units
What's Included
- OS-RMS42-230VO outdoor unit
- Designed to combine with OLMO Multi-Sierra indoor wall mounts, up to 4 zones (sold separately)
Specifications
| Refrigerant type | R454B |
| Power source | 208-230V, 1Ph, 60Hz |
| Voltage range (V) | 187-253 |
| EER2 | 12.0 |
| SEER2 | 22.0 |
| Net/gross weight (lb) | 172/194 |
| Unit dimensions (WxDxH) | 38-3/8x32-7/8x14-1/8 |
| Packing dimensions (WxDxH) | 43-3/4x37-3/4x18-1/8 |
| Operation range - heating | -4~75 |
| Operation range - cooling | 5~125 |
| Minimum circuit ampacity (A) | 36 |
| Max fuse (A) | 60 |
| HSPF2 [catalog] | 9.5 |
| COP2 [catalog] | 3.60 |
| Cooling Capacity (nominal) (Btu/h) [catalog] | 42,000 |
| Heating Rated Capacity (Btu/h) [catalog] | 36,000 |
| Outdoor Air Flow (Hi) (CFM) [catalog] | 3357 |
| Outdoor Side Noise Level (dB(A)) [catalog] | 64 |
| Refrigerant Charge (oz) [catalog] | 105.8 |
| Max Refrigerant Pipe Length (Each/Total ft) [catalog] | 82/262 |
Details
Overview
The OS-RMS42-230VO is a 42,000 Btu/h outdoor unit from OLMO's Multi-Sierra Series, a heat pump with inverter technology that can be combined with OLMO Multi-Sierra wall-mounted indoor units in up to 4 independent zones.
This 208-230V, 1Ph, 60Hz unit uses R454B refrigerant, measures 38-3/8x32-7/8x14-1/8 in, and weighs 172/194 lb net/gross.
Features
- Inverter technology heat pump
- Supports up to 4 independent indoor zones
- Smart Connect compatible with paired indoor units
What's Included
- OS-RMS42-230VO outdoor unit
- Designed to combine with OLMO Multi-Sierra indoor wall mounts, up to 4 zones (sold separately)
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.
