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Fuji vs MDX: heat pump ratings compared

Against heat pumps of the same size and type, a typical Fuji model beats 52% and a typical MDX model 66%. MDX rates higher overall.

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

Fuji

52%

of similar heat pumps beaten by its typical model

About average

12 models listed

MDX

66%

of similar heat pumps beaten by its typical model

Well above average

12 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°FFuji: Beats 54%MDX: Beats 81%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FFuji: Beats 57%MDX: Beats 64%
  • Winter-long heating efficiencyHSPF2Fuji: Beats 55%MDX: Beats 79%
  • Summer-long cooling efficiencySEER2Fuji: Beats 59%MDX: Beats 70%
  • Hot-day cooling efficiencyEER2Fuji: Beats 37%MDX: Beats 46%

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

    Fuji
    75%
    MDX
    92%

  • Xcel CC

    Fuji
    67%
    MDX
    92%

  • CEE Advanced

    Fuji
    0%
    MDX
    17%

  • ENERGY STAR CC

    Fuji
    0%
    MDX
    100%

All-around best, ductless 3.5–4.5 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Fuji

No ductless, 3.5–4.5 tons model from Fuji.

MDX

No ductless, 3.5–4.5 tons model from MDX.

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