ACIQ vs Fujitsu: heat pump ratings compared
Against heat pumps of the same size and type, a typical ACIQ model beats 50% and a typical Fujitsu model 53%. Fujitsu rates slightly higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
ACIQ
50%
of similar heat pumps beaten by its typical model
About average175 models listed
Fujitsu
53%
of similar heat pumps beaten by its typical model
About average179 models listed
- Efficiency on a 5°F dayCOP at 5°FACIQ: Beats 55%Fujitsu: Beats 60%
- Heating power kept at 5°FCapacity at 5°F vs 47°FACIQ: Beats 43%Fujitsu: Beats 48%
- Winter-long heating efficiencyHSPF2ACIQ: Beats 52%Fujitsu: Beats 44%
- Summer-long cooling efficiencySEER2ACIQ: Beats 49%Fujitsu: Beats 43%
- Hot-day cooling efficiencyEER2ACIQ: Beats 52%Fujitsu: Beats 47%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- ACIQ
- 55%
- Fujitsu
- 32%
Xcel CC
- ACIQ
- 46%
- Fujitsu
- 30%
CEE Advanced
- ACIQ
- 2%
- Fujitsu
- 8%
ENERGY STAR CC
- ACIQ
- 34%
- Fujitsu
- 27%
All-around best, ductless 3.5–4.5 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?
ACIQ
- 1ACIQ-48Z-HH-M6CACIQ4 tons · 47,000 Btu/h · DuctlessCold-climate pick, score 73.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 96% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Below the middle
- Winter efficiency
- 11.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 12.0 (EER2)
- Good
- 2ES-48Z-M6CACIQ4 tons · 46,000 Btu/h · DuctlessCold-climate pick, score 56.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 78% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.05 (COP at 5°F)
- Good
- Winter efficiency
- 10.5 (HSPF2)
- Good
- Cooling efficiency
- 22.2 (SEER2)
- Great
- Hot-day cooling
- 12.3 (EER2)
- Great
- 3ACIQ-55Z-HH-M6CACIQ4.5 tons · 51,000 Btu/h · DuctlessCold-climate pick, score 66.0Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 85% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.5 (HSPF2)
- Good
- Cooling efficiency
- 22.2 (SEER2)
- Great
- Hot-day cooling
- 12.0 (EER2)
- Good
Fujitsu
- 1AOUH42KUAH1with ductless indoor unit AUUH42KUASFujitsu3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 76.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 102% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.02 (COP at 5°F)
- Good
- Winter efficiency
- 10.6 (HSPF2)
- Good
- Cooling efficiency
- 22.0 (SEER2)
- Good
- Hot-day cooling
- 13.0 (EER2)
- Top 10%
- 2AOUK048MSAN7Fujitsu4 tons · 48,000 Btu/h · DuctlessCold-climate pick, score 52.0Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 78% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.36 (COP at 5°F)
- Top 10%
- Winter efficiency
- 9.8 (HSPF2)
- Below the middle
- Cooling efficiency
- 23.0 (SEER2)
- Great
- Hot-day cooling
- 13.0 (EER2)
- Top 10%
- 3AOUH48KUAH1with ductless indoor unit AUUH48KUASFujitsu4 tons · 46,000 Btu/h · DuctlessCold-climate pick, score 59.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 1.92 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.5 (HSPF2)
- Good
- Cooling efficiency
- 21.5 (SEER2)
- Good
- Hot-day cooling
- 12.5 (EER2)
- Top 10%
These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.
Next steps
The advanced view adds ranks, both brands’ models inside every size class, standout models per rating and cold-weather curves.
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