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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). 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