ACIQ vs AUX: heat pump ratings compared
Against heat pumps of the same size and type, a typical ACIQ model beats 53% and a typical AUX model 49%. ACIQ rates slightly higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
ACIQ
53%
of similar heat pumps beaten by its typical model
About average184 models listed
AUX
49%
of similar heat pumps beaten by its typical model
About average189 models listed
- Efficiency on a 5°F dayCOP at 5°FACIQ: Beats 56%AUX: Beats 60%
- Heating power kept at 5°FCapacity at 5°F vs 47°FACIQ: Beats 46%AUX: Beats 51%
- Winter-long heating efficiencyHSPF2ACIQ: Beats 55%AUX: Beats 40%
- Summer-long cooling efficiencySEER2ACIQ: Beats 52%AUX: Beats 48%
- Hot-day cooling efficiencyEER2ACIQ: Beats 55%AUX: Beats 39%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- ACIQ
- 58%
- AUX
- 68%
Xcel CC
- ACIQ
- 49%
- AUX
- 66%
CEE Advanced
- ACIQ
- 2%
- AUX
- 1%
ENERGY STAR CC
- ACIQ
- 37%
- AUX
- 35%
All-around best, ductless 2.5–3 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ductless, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?
ACIQ
- 1ACIQ-36Z-HH-M5CACIQ3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 78.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 10.7 (HSPF2)
- Top 10%
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 13.0 (EER2)
- Great
- 2ACIQ-36Z-E-HH-M4ACIQ3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 73.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 92% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 11.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 24.0 (SEER2)
- Top 10%
- Hot-day cooling
- 12.5 (EER2)
- Great
- 3ACIQ-27Z-HH-M4CACIQ2.5 tons · 27,000 Btu/h · DuctlessCold-climate pick, score 73.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 10.5 (HSPF2)
- Great
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 12.5 (EER2)
- Great
AUX
- 1AM4-H36/2DR3BAUXAlso listed as ASUM36HPMULO3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 73.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 92% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 11.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 24.0 (SEER2)
- Top 10%
- Hot-day cooling
- 12.5 (EER2)
- Great
- 2AM4-H30/2DR3AAUXAlso listed as ASPR30HPMULO2.5 tons · 30,000 Btu/h · DuctlessCold-climate pick, score 58.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 82% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 10.0 (HSPF2)
- Good
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 12.5 (EER2)
- Great
- 3AM4-H36/2DR3AAUXAlso listed as ASPR36HPMULO3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 52.0Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 71% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 10.0 (HSPF2)
- Good
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 12.3 (EER2)
- Good
These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.
Next steps
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