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First Co. vs MITS AIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical First Co. model beats 11% and a typical MITS AIR model 58%. MITS AIR rates higher overall.

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

First Co.

11%

of similar heat pumps beaten by its typical model

Well below average

21 models listed

MITS AIR

58%

of similar heat pumps beaten by its typical model

Above average

6 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°FFirst Co.: Beats 34%MITS AIR: Beats 42%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FFirst Co.: Beats 12%MITS AIR: Beats 80%
  • Winter-long heating efficiencyHSPF2First Co.: Beats 1%MITS AIR: Beats 76%
  • Summer-long cooling efficiencySEER2First Co.: Beats 0%MITS AIR: Beats 55%
  • Hot-day cooling efficiencyEER2First Co.: Beats 12%MITS AIR: Beats 47%

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

    First Co.
    0%
    MITS AIR
    100%

  • Xcel CC

    First Co.
    0%
    MITS AIR
    100%

  • CEE Advanced

    First Co.
    0%
    MITS AIR
    0%

  • ENERGY STAR CC

    First Co.
    0%
    MITS AIR
    100%

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?

First Co.

No ductless, 3.5–4.5 tons model from First Co..

MITS AIR

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

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