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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 2.5–3 tons

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

Showing Ductless, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

Brothers

No ductless, 2.5–3 tons model from Brothers.

KeplerX

No ductless, 2.5–3 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