ACiQ ACIQ-42Z-E-HH-M5: certified ratings
Cooling 42,000 BTU/h · SEER2 up to 23 · HSPF2 up to 10.25 · up to 82% of 47°F heating capacity at 5°F · Cold climate: Yes
ENERGY STAR lists 1 certified indoor pairing for this outdoor unit. Series: Multi-spilt series. Refrigerant: R-32. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Multi-spilt series | 42,000 | 23 | 12.4 | 10.25 | 42,000 | 35,200 | 34,400 | 82% | 2.05 | Yes | R-32 (GWP:675 | Lower GWP) | 217751662 | 4572996 |
"% 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 (42,000 BTU/h ÷ SEER2 23) | 1,826 | $334 |
| Heating (42,000 BTU/h ÷ HSPF2 10.25) | 4,098 | $750 |
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 |
|---|---|---|---|---|
| MRCOOL DIY-MULTI6-48HP230D-O | 21.8 | 10 | 77% | Yes |
| Pioneer YN050GLSI24M5G | 22 | 10 | 71% | Yes |
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.