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AUX vs Trane: heat pump ratings compared

Against heat pumps of the same size and type, a typical AUX model beats 49% and a typical Trane model 50%. Trane 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

Trane

50%

of similar heat pumps beaten by its typical model

About average

363 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%Trane: Beats 69%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAUX: Beats 51%Trane: Beats 43%
  • Winter-long heating efficiencyHSPF2AUX: Beats 40%Trane: Beats 35%
  • Summer-long cooling efficiencySEER2AUX: Beats 48%Trane: Beats 40%
  • Hot-day cooling efficiencyEER2AUX: Beats 39%Trane: Beats 67%

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%
    Trane
    39%

  • Xcel CC

    AUX
    66%
    Trane
    26%

  • CEE Advanced

    AUX
    1%
    Trane
    3%

  • ENERGY STAR CC

    AUX
    35%
    Trane
    18%

Top cold-climate picks, ductless 2.5–3 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, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

AUX

  1. 1AM4-H36/2DR3BAUXAlso listed as ASUM36HPMULO3 tons · 36,000 Btu/h · DuctlessKeeps 92% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    92% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.0 (HSPF2)
    Top 10%
    73.4score / 100
  2. 2ASPR30HPMULOAUX2.5 tons · 30,000 Btu/h · DuctlessKeeps 79% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    79% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.05 (COP at 5°F)
    Great
    Seasonal efficiency
    9.8 (HSPF2)
    Below the middle
    62.9score / 100
  3. 3ASPR36HPMULOAUX3 tons · 36,000 Btu/h · DuctlessKeeps 71% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.05 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    59.9score / 100

Trane

  1. 13TVHS036SF000AATraneAlso listed as 3TXK2224AF00HAA, 3TXK2236AF00HAA3 tons · 35,600 Btu/h · DuctlessKeeps 98% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    98% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.8 (HSPF2)
    Top 10%
    74.1score / 100
  2. 2M5THM2327A13NA*Trane (sold as RunTru)2.5 tons · 27,000 Btu/h · DuctlessKeeps 71% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    58.0score / 100
  3. 3M5THM2336A14NA*Trane (sold as RunTru)3 tons · 35,000 Btu/h · DuctlessKeeps 72% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    53.1score / 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