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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, ductless up to 1.5 tons

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

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

Brothers

No ductless, up to 1.5 tons model from Brothers.

KeplerX

No ductless, up to 1.5 tons model from KeplerX.

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