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Brothers vs KeplerX: heat pump ratings compared

One of these brands has too few models with every rating for an overall score; see each rating below.

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

Brothers

—

of similar heat pumps beaten by its typical model

Not enough rated models

4 models listed

KeplerX

42%

of similar heat pumps beaten by its typical model

Below average

20 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°FBrothers: Not ratedKeplerX: Beats 34%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBrothers: Not ratedKeplerX: Beats 41%
  • Winter-long heating efficiencyHSPF2Brothers: Beats 21%KeplerX: Beats 52%
  • Summer-long cooling efficiencySEER2Brothers: Beats 18%KeplerX: Beats 58%
  • Hot-day cooling efficiencyEER2Brothers: Beats 53%KeplerX: Beats 26%

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

    Brothers
    0%
    KeplerX
    35%

  • Xcel CC

    Brothers
    0%
    KeplerX
    25%

  • CEE Advanced

    Brothers
    0%
    KeplerX
    0%

  • ENERGY STAR CC

    Brothers
    0%
    KeplerX
    0%

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?

Brothers

None of Brothers’s ducted, 2.5–3 tons models has all five ratings.

KeplerX

  1. 1K20HVH36WD2VN3with ducted air handler K20HVH36WD2HN3KeplerX3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 64% of its heat at 5°FMeets CEE 2025, CEE 2026
    Heat kept at 5°F
    64% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    8.1 (HSPF2)
    Below the middle
    Cooling efficiency
    19.3 (SEER2)
    Great
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    54.1score / 100Heating 48 · Cooling 60
  2. 2K18HVH36WD2RKeplerX3 tons · 34,200 Btu/h · DuctedCold-climate pick, score 43.5Meets Xcel CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.86 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.2 (HSPF2)
    Below the middle
    Cooling efficiency
    18.5 (SEER2)
    Great
    Hot-day cooling
    10.8 (EER2)
    Below the middle
    47.7score / 100Heating 44 · Cooling 52
  3. 3K18HVH30WD2UN3with ducted air handler K18HVH30WD2HN3KeplerX2.5 tons · 30,000 Btu/h · DuctedNot a cold-climate pick: keeps 54% of its heat at 5°FMeets CEE 2025, CEE 2026
    Heat kept at 5°F
    55% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.5 (HSPF2)
    Good
    Cooling efficiency
    17.0 (SEER2)
    Good
    Hot-day cooling
    11.2 (EER2)
    Below the middle
    44.0score / 100Heating 39 · Cooling 49

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