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AIRSTAR vs WAYSOS: heat pump ratings compared

Against heat pumps of the same size and type, a typical AIRSTAR model beats 60% and a typical WAYSOS model 33%. 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

WAYSOS

33%

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%WAYSOS: Beats 71%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAIRSTAR: Beats 53%WAYSOS: Beats 28%
  • Winter-long heating efficiencyHSPF2AIRSTAR: Beats 58%WAYSOS: Beats 14%
  • Summer-long cooling efficiencySEER2AIRSTAR: Beats 73%WAYSOS: Beats 46%
  • Hot-day cooling efficiencyEER2AIRSTAR: Beats 73%WAYSOS: Beats 9%

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%
    WAYSOS
    0%

  • Xcel CC

    AIRSTAR
    100%
    WAYSOS
    0%

  • CEE Advanced

    AIRSTAR
    0%
    WAYSOS
    0%

  • ENERGY STAR CC

    AIRSTAR
    0%
    WAYSOS
    0%

All-around best, ducted up to 1.5 tons

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

WAYSOS

  1. 1CAPRO1K10K208VWAYSOSAlso listed as CAPRO2K10K208V1 ton · 10,000 Btu/h · DuctedCold-climate pick, score 41.3Meets none of the standards tracked here
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.32 (COP at 5°F)
    Great
    Winter efficiency
    7.5 (HSPF2)
    Below the middle
    Cooling efficiency
    16.4 (SEER2)
    Good
    Hot-day cooling
    9.9 (EER2)
    Below the middle
    36.3score / 100Heating 41 · Cooling 31
  2. 2CAPRO0010K115VWAYSOS1 ton · 10,000 Btu/h · DuctedCold-climate pick, score 30.4Meets none of the standards tracked here
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    7.5 (HSPF2)
    Below the middle
    Cooling efficiency
    15.0 (SEER2)
    Below the middle
    Hot-day cooling
    9.5 (EER2)
    Below the middle
    25.1score / 100Heating 30 · Cooling 20

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