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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%

All-around best, ducted up to 1.5 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

Showing Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

AUX

  1. 1ASUM18HPMULOAUX1.5 tons · 18,000 Btu/h · DuctedCold-climate pick, score 75.4Meets 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
    9.8 (HSPF2)
    Good
    Cooling efficiency
    20.5 (SEER2)
    Top 10%
    Hot-day cooling
    12.3 (EER2)
    Great
    79.8score / 100Heating 75 · Cooling 84
  2. 2AFEB09HP230V1CO-Uwith ducted air handler AFEB09HP230V1SDAUX1 ton · 9,100 Btu/h · DuctedCold-climate pick, score 53.2Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    93% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.85 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.0 (HSPF2)
    Below the middle
    Cooling efficiency
    19.5 (SEER2)
    Good
    Hot-day cooling
    13.0 (EER2)
    Great
    66.2score / 100Heating 53 · Cooling 79
  3. 3ASPR18HPMULOAUX1.5 tons · 17,700 Btu/h · DuctedCold-climate pick, score 56.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Good
    Cooling efficiency
    19.5 (SEER2)
    Good
    Hot-day cooling
    11.8 (EER2)
    Good
    62.3score / 100Heating 57 · Cooling 68

Lennox

  1. 1A-VHP09SA-1with ducted air handler B-VHP09DA-1Lennox (sold as Comfort Aire)1 ton · 9,000 Btu/h · DuctedCold-climate pick, score 80.3Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    120% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.85 (COP at 5°F)
    Below the middle
    Winter efficiency
    13.8 (HSPF2)
    Top 10%
    Cooling efficiency
    20.5 (SEER2)
    Top 10%
    Hot-day cooling
    14.0 (EER2)
    Top 10%
    86.9score / 100Heating 80 · Cooling 94
  2. 2A-ZHP15SA-1with ducted air handler B-ZHP15SA-1Lennox (sold as Comfort Aire)1.5 tons · 15,000 Btu/h · DuctedCold-climate pick, score 75.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    90% (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
    27.0 (SEER2)
    Top 10%
    Hot-day cooling
    13.0 (EER2)
    Great
    84.2score / 100Heating 76 · Cooling 93
  3. 3A-VXP18SA-1with ducted air handler WXP18SALennox (sold as Comfort Aire)1.5 tons · 18,000 Btu/h · DuctedCold-climate pick, score 87.1Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Winter efficiency
    10.8 (HSPF2)
    Top 10%
    Cooling efficiency
    19.3 (SEER2)
    Good
    Hot-day cooling
    12.1 (EER2)
    Great
    80.5score / 100Heating 87 · Cooling 74

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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