OS-RMS42-230VO
OLMO · HP - Mini or Multi Split
22BTU/Wh
9.5BTU/Wh
42000BTU/hr
Yes
OLMO OS-RMS42-230VO: SEER2 22 BTU/Wh, around the middle of the range for air-source heat pumps (category median 20 BTU/Wh).
SEER2: better than 89% of the 574 comparable models within 10% of this capacity. Their median is 16 BTU/Wh.
Where this model sits
The OLMO OS-RMS42-230VO is a 42000 BTU/hr hp - mini or multi split using R-454B, a refrigerant with moderate global warming potential (GWP 470). At 22 BTU/Wh it ranks around the middle of the 12,218 certified air-source heat pumps models. Among similar-sized air-source heat pumps (within 10% of its size), it is more efficient than the peer median of 16 BTU/Wh.
Specifications
| Efficiency | |
|---|---|
| SEER2 (best combination) | 22BTU/Wh |
| SEER2 (worst combination) | 22BTU/Wh |
| HSPF2 (best combination) | 9.5BTU/Wh |
| HSPF2 (worst combination) | 9.5BTU/Wh |
| EER2 (best combination) | 12BTU/Wh |
| COP at 5 °F | 1.92 |
| Capacity | |
| Cooling Capacity (max) | 42000BTU/hr |
| Cooling Capacity (min) | 42000BTU/hr |
| Heating at 47 °F | 48000BTU/hr |
| Heating at 17 °F | 28200BTU/hr |
| Heating at 5 °F | 36000BTU/hr |
All 25 specifications
| Configuration | |
|---|---|
| Product Type | HP - Mini or Multi Split |
| Compressor Staging | Continuously variable |
| Cold Climate Certified | Yes |
| Connected Capability | No |
| Series | SIERRA |
| Indoor-Unit Combinations Rated | 1 |
| Refrigerant | |
| Type | R-454B |
| GWP Rating | R-454B (GWP:470 | Lower GWP) |
| Identifiers | |
| Model Number | OS-RMS42-230VO |
| ENERGY STAR ID | ES_1132968_OS-RMS42-230VO_09182025231614_29217739003 |
| Partner | Cooper&Hunter International Corporation |
| Date Certified | 2026-01-14 |
| Available From | 2025-09-19 |
| Markets | United States |
Documentation
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