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AIRTEMP vs ZEPHYR: heat pump ratings compared

Against heat pumps of the same size and type, a typical AIRTEMP model beats 36% and a typical ZEPHYR model 63%. ZEPHYR rates higher overall.

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

AIRTEMP

36%

of similar heat pumps beaten by its typical model

Well below average

47 models listed

ZEPHYR

63%

of similar heat pumps beaten by its typical model

Well above average

23 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°FAIRTEMP: Beats 25%ZEPHYR: Beats 57%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAIRTEMP: Beats 37%ZEPHYR: Beats 64%
  • Winter-long heating efficiencyHSPF2AIRTEMP: Beats 30%ZEPHYR: Beats 59%
  • Summer-long cooling efficiencySEER2AIRTEMP: Beats 35%ZEPHYR: Beats 67%
  • Hot-day cooling efficiencyEER2AIRTEMP: Beats 48%ZEPHYR: Beats 65%

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

    AIRTEMP
    43%
    ZEPHYR
    100%

  • Xcel CC

    AIRTEMP
    40%
    ZEPHYR
    83%

  • CEE Advanced

    AIRTEMP
    4%
    ZEPHYR
    9%

  • ENERGY STAR CC

    AIRTEMP
    26%
    ZEPHYR
    74%

All-around best, ductless 5 tons and up

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

Showing Ductless, 5 tons and up (57,000 Btu/h and up cooling). What size is my system?

AIRTEMP

No ductless, 5 tons and up model from AIRTEMP.

ZEPHYR

No ductless, 5 tons and up model from ZEPHYR.

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