ACiQ ACIQ-18Z-E-M2: certified ratings
Cooling 17,700 BTU/h · SEER2 up to 20.75 · HSPF2 up to 9.75 · up to 79% 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 | 17,700 | 20.75 | 12.05 | 9.75 | 18,000 | 14,300 | 14,200 | 79% | 1.95 | Yes | R-32 (GWP:675 | Lower GWP) | 217751654 | 4573000 |
"% 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 (17,700 BTU/h ÷ SEER2 20.75) | 853 | $156 |
| Heating (18,000 BTU/h ÷ HSPF2 9.75) | 1,846 | $338 |
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 SENE-18EL-IHH | 25.6 | 16.2 | 113% | Yes |
| Senville SENE-18EL-OH | 25.6 | 16.2 | 113% | Yes |
| Pioneer YN018GMSI24RPG | 23.8 | 13.5 | 77% | Yes |
| MRCOOL O-HH-18-HP-C-230C-O | 21.4 | 12.3 | 100% | Yes |
| MRCOOL DIYHH-18-HP-C-230D25-O | 21.2 | 12.2 | 100% | Yes |
| MRCOOL DIY-18-HP-C-230D25-O | 22.5 | 11.5 | 73% | Yes |
| MRCOOL DIYP-18-HP-C-230DE11-O | 22.5 | 11.5 | 71% | Yes |
| MRCOOL O-HH-18-HP-C-230A | 21.5 | 11.3 | 100% | 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.