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KeplerX vs SUNCHILLERS: heat pump ratings compared

Against heat pumps of the same size and type, a typical KeplerX model beats 53% and a typical SUNCHILLERS model 68%. SUNCHILLERS rates higher overall.

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

KeplerX

53%

of similar heat pumps beaten by its typical model

About average

8 models listed

SUNCHILLERS

68%

of similar heat pumps beaten by its typical model

Well above 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 49%SUNCHILLERS: Beats 50%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FKeplerX: Beats 78%SUNCHILLERS: Beats 45%
  • Winter-long heating efficiencyHSPF2KeplerX: Beats 33%SUNCHILLERS: Beats 74%
  • Summer-long cooling efficiencySEER2KeplerX: Beats 22%SUNCHILLERS: Beats 88%
  • Hot-day cooling efficiencyEER2KeplerX: Beats 54%SUNCHILLERS: Beats 71%

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
    0%
    SUNCHILLERS
    100%

  • Xcel CC

    KeplerX
    0%
    SUNCHILLERS
    50%

  • CEE Advanced

    KeplerX
    0%
    SUNCHILLERS
    0%

  • ENERGY STAR CC

    KeplerX
    0%
    SUNCHILLERS
    0%

Top cold-climate picks, ducted 2.5–3 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, 2.5–3 tons (27,000–38,999 Btu/h cooling), the most-listed ducted size. Pick yours above. What size is my system?

KeplerX

None of KeplerX’s ducted, 2.5–3 tons models qualifies.

SUNCHILLERS

None of SUNCHILLERS’s ducted, 2.5–3 tons models qualifies.

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