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BreezeAero vs SUM X: heat pump ratings compared

Against heat pumps of the same size and type, a typical BreezeAero model beats 38% and a typical SUM X model 73%. SUM X rates higher overall.

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

BreezeAero

38%

of similar heat pumps beaten by its typical model

Well below average

6 models listed

SUM X

73%

of similar heat pumps beaten by its typical model

Well above average

6 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°FBreezeAero: Beats 32%SUM X: Beats 78%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBreezeAero: Beats 42%SUM X: Beats 80%
  • Winter-long heating efficiencyHSPF2BreezeAero: Beats 54%SUM X: Beats 70%
  • Summer-long cooling efficiencySEER2BreezeAero: Beats 41%SUM X: Beats 79%
  • Hot-day cooling efficiencyEER2BreezeAero: Beats 24%SUM X: Beats 61%

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

    BreezeAero
    67%
    SUM X
    100%

  • Xcel CC

    BreezeAero
    67%
    SUM X
    100%

  • CEE Advanced

    BreezeAero
    0%
    SUM X
    0%

  • ENERGY STAR CC

    BreezeAero
    0%
    SUM X
    100%

All-around best, ducted 2.5–3 tons

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

Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling), the most-listed ducted size. Pick yours above. What size is my system?

BreezeAero

No ducted, 2.5–3 tons model from BreezeAero.

SUM X

  1. 1SM-36HSM2-CUwith ducted air handler SM-36HSM2-AHSUM X2.5 tons · 32,000 Btu/h · DuctedCold-climate pick, score 87.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    97% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.15 (COP at 5°F)
    Great
    Winter efficiency
    10.5 (HSPF2)
    Top 10%
    Cooling efficiency
    19.5 (SEER2)
    Top 10%
    Hot-day cooling
    11.7 (EER2)
    Good
    82.3score / 100Heating 88 · Cooling 77

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