AUX vs Lennox: heat pump ratings compared
Against heat pumps of the same size and type, a typical AUX model beats 49% and a typical Lennox model 48%. AUX rates slightly higher overall.
Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated
AUX
49%
of similar heat pumps beaten by its typical model
About average189 models listed
Lennox
48%
of similar heat pumps beaten by its typical model
About average337 models listed
- Efficiency on a 5°F dayCOP at 5°FAUX: Beats 60%Lennox: Beats 46%
- Heating power kept at 5°FCapacity at 5°F vs 47°FAUX: Beats 51%Lennox: Beats 44%
- Winter-long heating efficiencyHSPF2AUX: Beats 40%Lennox: Beats 44%
- Summer-long cooling efficiencySEER2AUX: Beats 48%Lennox: Beats 45%
- Hot-day cooling efficiencyEER2AUX: Beats 39%Lennox: Beats 57%
Average (50%)Dashed outline: the other brand, for comparison
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Rebate standards
CEE 2025
- AUX
- 68%
- Lennox
- 44%
Xcel CC
- AUX
- 66%
- Lennox
- 36%
CEE Advanced
- AUX
- 1%
- Lennox
- 3%
ENERGY STAR CC
- AUX
- 35%
- Lennox
- 30%
All-around best, ducted 2.5–3 tons
Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.
Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?
AUX
- 1ASUM36HPMULOAUX3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 66.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 94% (Capacity at 5°F vs 47°F)
- Great
- Efficiency at 5°F
- 1.90 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.0 (HSPF2)
- Great
- Cooling efficiency
- 21.5 (SEER2)
- Top 10%
- Hot-day cooling
- 12.5 (EER2)
- Top 10%
- 2ASPR30HPMULOAUX2.5 tons · 30,000 Btu/h · DuctedCold-climate pick, score 73.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 77% (Capacity at 5°F vs 47°F)
- Good
- Efficiency at 5°F
- 2.10 (COP at 5°F)
- Great
- Winter efficiency
- 9.5 (HSPF2)
- Great
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 12.0 (EER2)
- Great
- 3ASPR36HPMULOAUX3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 70.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 70% (Capacity at 5°F vs 47°F)
- Below the middle
- Efficiency at 5°F
- 2.10 (COP at 5°F)
- Great
- Winter efficiency
- 10.0 (HSPF2)
- Great
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 11.6 (EER2)
- Good
Lennox
- 1SL22KLV-036-230A**with ducted air handler CBK48MVT-060-230-Lennox3 tons · 35,200 Btu/h · DuctedCold-climate pick, score 93.7Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
- Heat kept at 5°F
- 102% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.42 (COP at 5°F)
- Top 10%
- Winter efficiency
- 10.5 (HSPF2)
- Top 10%
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 13.0 (EER2)
- Top 10%
- 2A-VHP365A-1Lennox (sold as Comfort-Aire)3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 82.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
- Heat kept at 5°F
- 106% (Capacity at 5°F vs 47°F)
- Top 10%
- Efficiency at 5°F
- 2.00 (COP at 5°F)
- Good
- Winter efficiency
- 10.4 (HSPF2)
- Top 10%
- Cooling efficiency
- 19.4 (SEER2)
- Great
- Hot-day cooling
- 12.0 (EER2)
- Great
- 3MMLD030S6S-1Pwith ducted air handler MDDD030S6-1PLennox2.5 tons · 30,000 Btu/h · DuctedCold-climate pick, score 64.7Meets 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
- 1.80 (COP at 5°F)
- Below the middle
- Winter efficiency
- 10.0 (HSPF2)
- Great
- Cooling efficiency
- 20.0 (SEER2)
- Top 10%
- Hot-day cooling
- 13.0 (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
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