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AUX vs Carrier: heat pump ratings compared

Against heat pumps of the same size and type, a typical AUX model beats 52% and a typical Carrier 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

52%

of similar heat pumps beaten by its typical model

About average

149 models listed

Carrier

48%

of similar heat pumps beaten by its typical model

About average

816 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 62%Carrier: Beats 56%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAUX: Beats 51%Carrier: Beats 34%
  • Winter-long heating efficiencyHSPF2AUX: Beats 43%Carrier: Beats 40%
  • Summer-long cooling efficiencySEER2AUX: Beats 51%Carrier: Beats 42%
  • Hot-day cooling efficiencyEER2AUX: Beats 40%Carrier: Beats 59%

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%
    Carrier
    40%

  • Xcel CC

    AUX
    63%
    Carrier
    27%

  • CEE Advanced

    AUX
    1%
    Carrier
    1%

  • ENERGY STAR CC

    AUX
    44%
    Carrier
    27%

Top cold-climate picks, ducted up to 1.5 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 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 · DuctedKeeps 106% of its heat at 5°FMeets 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
    Seasonal efficiency
    9.8 (HSPF2)
    Good
    74.7score / 100
  2. 2ASPR18HPMULOAUX1.5 tons · 17,700 Btu/h · DuctedKeeps 78% of its heat at 5°FMeets 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
    Seasonal efficiency
    9.5 (HSPF2)
    Good
    55.6score / 100
  3. 3AHU18HPV1BOwith ducted air handler AHU18HPV1BIAUX1.5 tons · 18,000 Btu/h · DuctedKeeps 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
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.0 (HSPF2)
    Below the middle
    53.8score / 100

Carrier

  1. 137MAHAQ06AA3with ducted air handler 45MBDAQ06XA3CarrierAlso sold as Arcoaire D5CSHAH06AAK0.5 tons · 6,500 Btu/h · DuctedKeeps 98% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    98% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.41 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    13.8 (HSPF2)
    Top 10%
    93.5score / 100
  2. 237MUHAQ18AA3with indoor coil DM36A3J+TDR and furnace 8(0,1)*SB36070M17Carrier (sold as Bryant Heating and Cooling Systems)1.5 tons · 16,800 Btu/h · DuctedKeeps 95% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    95% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    3.00 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.8 (HSPF2)
    Top 10%
    92.9score / 100
  3. 3D5CUHAH18AAKwith ducted air handler FM(C,U)5Z18**ALCarrier (sold as HEIL)1.5 tons · 18,000 Btu/h · DuctedKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.08 (COP at 5°F)
    Good
    Seasonal efficiency
    12.5 (HSPF2)
    Top 10%
    88.8score / 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.

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