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AIRSTAR vs Comfort Kool: heat pump ratings compared

Against heat pumps of the same size and type, a typical AIRSTAR model beats 60% and a typical Comfort Kool model 34%. AIRSTAR rates higher overall.

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

AIRSTAR

60%

of similar heat pumps beaten by its typical model

Well above average

3 models listed

Comfort Kool

34%

of similar heat pumps beaten by its typical model

Well below average

3 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°FAIRSTAR: Beats 34%Comfort Kool: Beats 36%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAIRSTAR: Beats 53%Comfort Kool: Beats 27%
  • Winter-long heating efficiencyHSPF2AIRSTAR: Beats 58%Comfort Kool: Beats 45%
  • Summer-long cooling efficiencySEER2AIRSTAR: Beats 73%Comfort Kool: Beats 41%
  • Hot-day cooling efficiencyEER2AIRSTAR: Beats 73%Comfort Kool: Beats 22%

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

    AIRSTAR
    100%
    Comfort Kool
    100%

  • Xcel CC

    AIRSTAR
    100%
    Comfort Kool
    33%

  • CEE Advanced

    AIRSTAR
    0%
    Comfort Kool
    0%

  • ENERGY STAR CC

    AIRSTAR
    0%
    Comfort Kool
    0%

Top cold-climate picks, ducted up to 1.5 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 Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

AIRSTAR

No ducted, up to 1.5 tons model from AIRSTAR.

Comfort Kool

No ducted, up to 1.5 tons model from Comfort Kool.

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