MRCOOL O-ES-09-HP-C-230C-O1: certified ratings
Cooling 9,000 BTU/h · SEER2 up to 27.4 · HSPF2 up to 12.5 · up to 112% of 47°F heating capacity at 5°F · Cold climate: Yes
ENERGY STAR lists 3 certified indoor pairings for this outdoor unit. Series: O-ES Series. Refrigerant: R-454B. Compressor: continuously variable (inverter), per ENERGY STAR.
All certified pairings (highest HSPF2 first)
| Indoor unit | Series | Cooling BTU/h | SEER2 | EER2 | HSPF2 | Heat 47°F | Heat 17°F | Heat 5°F | % of 47°F cap. at 5°F | COP 5°F | Cold climate | Refrigerant | AHRI ref. | ENERGY STAR record |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| O-09-HP-WMAH-230C-O | O-ES Series | 9,000 | 27.4 | 15.4 | 12.5 | 12,000 | 12,000 | 11,500 | 96% | 1.8 | Yes | R-454B (GWP:470 | Lower GWP) | 217447801 | 4428961 |
| DUCT-09HP-230B-O | O-ES Series | 9,000 | 21.4 | 13.4 | 12.5 | 10,000 | 9,600 | 11,200 | 112% | 1.89 | Yes | R-454B (GWP:470 | Lower GWP) | 217447803 | 4428963 |
| CASSETTE09HP-230C-O | O-ES Series | 9,000 | 22.6 | 14 | 12.1 | 10,000 | 9,700 | 11,000 | 110% | 1.84 | Yes | R-454B (GWP:470 | Lower GWP) | 217447802 | 4428962 |
"% of 47°F capacity at 5°F" = heating capacity at 5°F ÷ heating capacity at 47°F, both from the ENERGY STAR record (ENERGY STAR's cold-climate designation requires ≥70% and COP ≥1.75 at 5°F; criteria).
Rough running-cost yardstick (top-rated pairing)
| kWh per 1,000 full-load hours | Cost at U.S. avg rate | |
|---|---|---|
| Cooling (9,000 BTU/h ÷ SEER2 27.4) | 328 | $60 |
| Heating (12,000 BTU/h ÷ HSPF2 12.5) | 960 | $176 |
Cost estimates: cooling kWh ≈ cooling capacity × full-load hours ÷ SEER2 ÷ 1,000; heating kWh ≈ 47°F heating capacity × full-load hours ÷ HSPF2 ÷ 1,000. "Per 1,000 full-load hours" is a yardstick for comparing systems, not a prediction of your bill; your hours depend on climate, house and settings. Rate: U.S. average residential 18.31¢/kWh (EIA, July 2026 (preliminary)).
Estimate with your own hours and rate · Compare with another system
Similar-capacity single-zone units from other DIY brands
| Outdoor unit | Best SEER2 | Best HSPF2 | Best % cap. at 5°F | Cold climate |
|---|---|---|---|---|
| Senville SENA-06HF-OG | 25.5 | 14.8 | 110% | Yes |
| Senville SENE-09EL-OH | 33.3 | 14.6 | 112% | Yes |
| ACiQ ACIQ-06ZPL-HP230B | 26.5 | 13.6 | 113% | Yes |
| Senville SENA/09HF/OQ | 28.1 | 12 | 108% | Yes |
| Pioneer YN009GMSI24RPG | 22.1 | 11.8 | 73% | Yes |
| Pioneer YN009GMFI22RPE | 22.5 | 11.5 | 80% | Yes |
| ACiQ ACIQ-09ZS-HP115C | 24.5 | 10.7 | 73% | Yes |
| Pioneer YN009GHFI25RPH | 25.5 | 10.5 | 78% | Yes |
See MRCOOL on the manufacturer's site (plain link, not an affiliate link)
We have not tested or installed this equipment. Data gaps: price, sound level, line-set length, warranty and installation requirements are not in ENERGY STAR data. Confirm the AHRI reference number on your quote matches a certified pairing.