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KeplerX vs TKS: heat pump ratings compared

Against heat pumps of the same size and type, a typical KeplerX model beats 42% and a typical TKS model 31%. KeplerX rates higher overall.

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

KeplerX

42%

of similar heat pumps beaten by its typical model

Below average

20 models listed

TKS

31%

of similar heat pumps beaten by its typical model

Well below 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°FKeplerX: Beats 34%TKS: Beats 23%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FKeplerX: Beats 41%TKS: Beats 43%
  • Winter-long heating efficiencyHSPF2KeplerX: Beats 52%TKS: Beats 16%
  • Summer-long cooling efficiencySEER2KeplerX: Beats 58%TKS: Beats 35%
  • Hot-day cooling efficiencyEER2KeplerX: Beats 26%TKS: Beats 36%

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

    KeplerX
    35%
    TKS
    75%

  • Xcel CC

    KeplerX
    25%
    TKS
    100%

  • CEE Advanced

    KeplerX
    0%
    TKS
    0%

  • ENERGY STAR CC

    KeplerX
    0%
    TKS
    0%

Top cold-climate picks, ducted up to 1.5 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 Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

KeplerX

None of KeplerX’s ducted, up to 1.5 tons models qualifies.

TKS

No ducted, up to 1.5 tons model from TKS.

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