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Comfort Temps vs KeplerX: heat pump ratings compared

Against heat pumps of the same size and type, a typical Comfort Temps model beats 49% and a typical KeplerX model 42%. Comfort Temps rates higher overall.

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

Comfort Temps

49%

of similar heat pumps beaten by its typical model

About average

20 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°FComfort Temps: Beats 37%KeplerX: Beats 34%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FComfort Temps: Beats 38%KeplerX: Beats 41%
  • Winter-long heating efficiencyHSPF2Comfort Temps: Beats 53%KeplerX: Beats 52%
  • Summer-long cooling efficiencySEER2Comfort Temps: Beats 59%KeplerX: Beats 58%
  • Hot-day cooling efficiencyEER2Comfort Temps: Beats 52%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

    Comfort Temps
    100%
    KeplerX
    35%

  • Xcel CC

    Comfort Temps
    90%
    KeplerX
    25%

  • CEE Advanced

    Comfort Temps
    0%
    KeplerX
    0%

  • ENERGY STAR CC

    Comfort Temps
    60%
    KeplerX
    0%

Top cold-climate picks, ducted 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 Ducted, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Comfort Temps

No ducted, 3.5–4.5 tons model from Comfort Temps.

KeplerX

  1. 1K18HVH48WD2RKeplerX4 tons · 48,000 Btu/h · DuctedKeeps 93% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    93% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.0 (HSPF2)
    Good
    60.3score / 100
  2. 2K18HVH60WD2RKeplerX4.5 tons · 55,000 Btu/h · DuctedKeeps 81% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    81% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.82 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.0 (HSPF2)
    Good
    56.9score / 100

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