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AUX heat pumps: how do their ratings compare?

A typical AUX heat pump beats 52% of similar heat pumps (same size and type), which is about average. AUX has 149 heat pump models in this list.

Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated

Overall score

52%

of similar heat pumps beaten by its typical model

About average

Ranked 18 among brands with a QMID on file. Based on 139 models with every rating.

AUX, rating by ratingStrongest on efficiency on a 5°f day (beats 62%), weakest on hot-day cooling efficiency (beats 40%).
  • Efficiency on a 5°F dayCOP at 5°FBeats 62%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBeats 51%
  • Winter-long heating efficiencyHSPF2Beats 43%
  • Summer-long cooling efficiencySEER2Beats 51%
  • Hot-day cooling efficiencyEER2Beats 40%

Average (50%)

Each bar: the share of similar heat pumps a typical model beats on that rating.

Want AUX’s ranks and its models inside every size class? Switch to Advanced

Rebate standards

Share of this brand’s models that meet the efficiency levels rebate programs use. Programs can have other rules too.

  • 68%

    meet CEE 2025 Tier 1, the level many utility rebates use.

    101 models. All brands: 57%.

    See them

  • 63%

    meet Xcel Energy Colorado’s cold-climate rebate levels.

    94 models. All brands: 53%.

    See them

  • 1%

    reach the cold-climate tier: full heating output and a COP of 2.1 or more at 5°F.

    2 models. All brands: 3%.

    See them

Top AUX cold-climate picks, by size

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

58 of AUX’s 90 models of this size and type qualify.

  1. 1AM2-H18/2DR3BAUXAlso listed as ASUM18HPMULO1.5 tons · 18,000 Btu/h · DuctlessKeeps 121% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    121% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.0 (HSPF2)
    Great
    82.7score / 100
  2. 2ASW-H18E3B2/*R3DI-D2with ductless indoor unit ASW-H18E3B2/*R3DI-D2AUXAlso listed as ASW-H18E3B2/**R3DI-D21.5 tons · 18,000 Btu/h · DuctlessKeeps 82% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    82% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    79.2score / 100
  3. 3AMAR18HP230V1COwith ductless indoor unit AMAR18HP230V1CHAUX1.5 tons · 18,000 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)
    Good
    Efficiency at 5°F
    2.21 (COP at 5°F)
    Great
    Seasonal efficiency
    10.2 (HSPF2)
    Great
    77.2score / 100
  4. 4ASW-H12C5C2/*R3DI-C5with ductless indoor unit ASW-H12C5C2/*R3DI-C5AUX1 ton · 12,000 Btu/h · DuctlessKeeps 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
    2.32 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.1 (HSPF2)
    Good
    75.0score / 100
  5. 5ASW-H12C5C2/**R3DI-C5with ductless indoor unit ASW-H12C5C2/**R3DI-C5AUX1 ton · 12,000 Btu/h · DuctlessKeeps 78% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.32 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.1 (HSPF2)
    Good
    75.0score / 100

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

What to do next

The advanced view has AUX’s ranks on each rating, its models inside every size and type, cold-weather curves and its newest certifications.

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