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iFFALCON vs KeplerX: heat pump ratings compared

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

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

iFFALCON

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°FiFFALCON: Beats 28%KeplerX: Beats 34%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FiFFALCON: Beats 51%KeplerX: Beats 41%
  • Winter-long heating efficiencyHSPF2iFFALCON: Beats 54%KeplerX: Beats 52%
  • Summer-long cooling efficiencySEER2iFFALCON: Beats 58%KeplerX: Beats 58%
  • Hot-day cooling efficiencyEER2iFFALCON: Beats 37%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

    iFFALCON
    70%
    KeplerX
    35%

  • Xcel CC

    iFFALCON
    75%
    KeplerX
    25%

  • CEE Advanced

    iFFALCON
    0%
    KeplerX
    0%

  • ENERGY STAR CC

    iFFALCON
    75%
    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?

iFFALCON

  1. 1F48FMHD6XPCiFFALCON4 tons · 48,000 Btu/h · DuctlessKeeps 88% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    88% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Below the middle
    48.1score / 100
  2. 2F42FMH22XQCiFFALCON3.5 tons · 42,000 Btu/h · DuctlessKeeps 74% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    74% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Below the middle
    32.7score / 100

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