1HVAC vs LG: heat pump ratings compared
Against heat pumps of the same size and type, a typical 1HVAC model beats 61% and a typical LG model 56%. 1HVAC rates higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
1HVAC
61%
of similar heat pumps beaten by its typical model
Well above average70 models listed
LG
56%
of similar heat pumps beaten by its typical model
Above average100 models listed
- Efficiency on a 5°F dayCOP at 5°F1HVAC: Beats 57%LG: Beats 56%
- Heating power kept at 5°FCapacity at 5°F vs 47°F1HVAC: Beats 59%LG: Beats 57%
- Winter-long heating efficiencyHSPF21HVAC: Beats 71%LG: Beats 51%
- Summer-long cooling efficiencySEER21HVAC: Beats 64%LG: Beats 49%
- Hot-day cooling efficiencyEER21HVAC: Beats 55%LG: Beats 64%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- 1HVAC
- 87%
- LG
- 86%
Xcel CC
- 1HVAC
- 74%
- LG
- 78%
CEE Advanced
- 1HVAC
- 4%
- LG
- 11%
ENERGY STAR CC
- 1HVAC
- 77%
- LG
- 64%
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?
1HVAC
- 1ACIQ-48Z-HH-M6C1HVAC4 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-M6C1HVAC4 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-M6C1HVAC4.5 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
LG
- 1KUMXA421ALG3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 95.9Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.29 (COP at 5°F)
- Top 10%
- Winter efficiency
- 11.0 (HSPF2)
- Top 10%
- Cooling efficiency
- 21.5 (SEER2)
- Good
- Hot-day cooling
- 13.8 (EER2)
- Top 10%
- 2ZRUM048GSS0LG4 tons · 48,000 Btu/h · DuctlessCold-climate pick, score 80.2Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
- Heat kept at 5°F
- 100% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.10 (COP at 5°F)
- Great
- Winter efficiency
- 10.3 (HSPF2)
- Good
- Cooling efficiency
- 23.3 (SEER2)
- Top 10%
- Hot-day cooling
- 13.5 (EER2)
- Top 10%
- 3KUSXA421Awith ductless indoor unit KNSCB421ALG3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 88.6Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 91% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 2.20 (COP at 5°F)
- Top 10%
- Winter efficiency
- 10.8 (HSPF2)
- Great
- Cooling efficiency
- 21.5 (SEER2)
- Good
- Hot-day cooling
- 13.5 (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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