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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, ductless 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 Ductless, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

KeplerX

No ductless, up to 1.5 tons model from KeplerX.

SUNCHILLERS

  1. 19WODU-ULwith ductless indoor unit 9WIDU-ULSUNCHILLERS1 ton · 9,000 Btu/h · DuctlessKeeps 86% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    86% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.19 (COP at 5°F)
    Great
    Seasonal efficiency
    12.3 (HSPF2)
    Top 10%
    86.0score / 100
  2. 2M18ODU-UL2PSUNCHILLERS1.5 tons · 18,000 Btu/h · DuctlessKeeps 74% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    74% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.86 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.2 (HSPF2)
    Good
    56.6score / 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