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MAXI AIR vs MSH LEGACY: heat pump ratings compared

Against heat pumps of the same size and type, a typical MAXI AIR model beats 75% and a typical MSH LEGACY model 34%. MAXI AIR rates higher overall.

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

MAXI AIR

75%

of similar heat pumps beaten by its typical model

Well above average

10 models listed

MSH LEGACY

34%

of similar heat pumps beaten by its typical model

Well below average

7 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°FMAXI AIR: Beats 51%MSH LEGACY: Beats 25%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FMAXI AIR: Beats 83%MSH LEGACY: Beats 11%
  • Winter-long heating efficiencyHSPF2MAXI AIR: Beats 83%MSH LEGACY: Beats 24%
  • Summer-long cooling efficiencySEER2MAXI AIR: Beats 77%MSH LEGACY: Beats 39%
  • Hot-day cooling efficiencyEER2MAXI AIR: Beats 77%MSH LEGACY: Beats 56%

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

    MAXI AIR
    100%
    MSH LEGACY
    0%

  • Xcel CC

    MAXI AIR
    100%
    MSH LEGACY
    0%

  • CEE Advanced

    MAXI AIR
    0%
    MSH LEGACY
    0%

  • ENERGY STAR CC

    MAXI AIR
    70%
    MSH LEGACY
    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?

MAXI AIR

No ductless, 3.5–4.5 tons model from MAXI AIR.

MSH LEGACY

No ductless, 3.5–4.5 tons model from MSH LEGACY.

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