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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 older R-410A heat pumps, no longer installed new. See models sold today · Updated

Brothers

—

of similar heat pumps beaten by its typical model

Not enough rated models

8 models listed

KeplerX

53%

of similar heat pumps beaten by its typical model

About average

8 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 49%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBrothers: Not ratedKeplerX: Beats 78%
  • Winter-long heating efficiencyHSPF2Brothers: Beats 24%KeplerX: Beats 33%
  • Summer-long cooling efficiencySEER2Brothers: Beats 17%KeplerX: Beats 22%
  • Hot-day cooling efficiencyEER2Brothers: Beats 56%KeplerX: Beats 54%

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
    0%

  • Xcel CC

    Brothers
    0%
    KeplerX
    0%

  • CEE Advanced

    Brothers
    0%
    KeplerX
    0%

  • ENERGY STAR CC

    Brothers
    0%
    KeplerX
    0%

Top cold-climate picks, ductless 3.5–4.5 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.

Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Brothers

No ductless, 3.5–4.5 tons model from Brothers.

KeplerX

No ductless, 3.5–4.5 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