ACiQ SC-42Z-HH-M5B: certified ratings
Cooling 36,000 BTU/h · SEER2 up to 21 · HSPF2 up to 10 · up to 81% of 47°F heating capacity at 5°F · Cold climate: Yes
ENERGY STAR lists 1 certified indoor pairing for this outdoor unit. Series: Extreme Heat. Refrigerant: R-410A. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Extreme Heat | 36,000 | 21 | 12 | 10 | 40,000 | 35,600 | 32,400 | 81% | 1.92 | Yes | R-410A (GWP:2088) | 214784530 | 3544186 |
"% 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 (36,000 BTU/h ÷ SEER2 21) | 1,714 | $314 |
| Heating (40,000 BTU/h ÷ HSPF2 10) | 4,000 | $732 |
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-36HF-MOB | 22.4 | 10.9 | 103% | Yes |
| Senville SENA-36HF-MOA | 23 | 10.7 | 100% | Yes |
| Senville SENA-33HF-OG | 19.5 | 10.5 | 97% | Yes |
| Pioneer YN036GMSI20RUG | 20 | 10.3 | 70% | Yes |
| Pioneer YN040GLSI24M4G | 22.5 | 10 | 72% | Yes |
| Senville SENA-33HF-OQ | 19.5 | 10 | 99% | Yes |
| MRCOOL DIY-MULTI5-36HP230D-O | 23 | 9.9 | 70% | Yes |
| MRCOOL MULTI4-36HP230B | 23.9 | 9.5 | 68% | No |
See ACiQ 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.