Skip to content
Rebate.Blue

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 average

189 models listed

Lennox

48%

of similar heat pumps beaten by its typical model

About average

337 models listed

Rating by ratingEach bar is the share of same-size, same-type heat pumps that a typical model beats, so the two brands compare fairly even if they make different sizes.
  • 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

Want ranks, distributions per size class and cold-weather curves? Switch to Advanced

Rebate standards

Share of each brand’s models that meet the level. Programs can have other rules too.

  • 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%

Top cold-climate picks, ductless 2 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.

Showing Ductless, 2 tons (21,000–26,999 Btu/h cooling). What size is my system?

AUX

  1. 1AM3-H24/2DR3BAUXAlso listed as ASUM24HPMULO2 tons · 24,000 Btu/h · DuctlessKeeps 108% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    108% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    84.6score / 100
  2. 2AFEB24HP230V1COwith ductless indoor unit AFEB24HP230V1CHAUXAlso listed as ASW-H24F8A2/**R3DI-C72 tons · 23,000 Btu/h · DuctlessKeeps 87% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    87% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    78.4score / 100
  3. 3ASW-H24F6A2/ *R3DI-D7with ductless indoor unit ASW-H24F6A2/ *R3DI-D7AUXAlso listed as ASW-H24F6A2/**R3DI-D72 tons · 22,400 Btu/h · DuctlessKeeps 85% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    85% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    78.1score / 100

Lennox

  1. 1A-VHP24SA-1with ductless indoor unit B-VHP24CA-1Lennox (sold as Comfort Aire)2 tons · 23,400 Btu/h · DuctlessKeeps 95% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    95% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.23 (COP at 5°F)
    Great
    Seasonal efficiency
    11.6 (HSPF2)
    Top 10%
    90.0score / 100
  2. 2A-KZP24SA-1with ductless indoor unit B-KZP24SA-1Lennox (sold as Comfort Aire)2 tons · 24,000 Btu/h · DuctlessKeeps 83% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Great
    Seasonal efficiency
    11.0 (HSPF2)
    Great
    82.1score / 100
  3. 3MMLD020S6M-1PLennox2 tons · 21,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets 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
    1.95 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    71.7score / 100

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.

Open the advanced view