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Cowsar vs DAIZUKI: heat pump ratings compared

Against heat pumps of the same size and type, a typical Cowsar model beats 34% and a typical DAIZUKI model 47%. DAIZUKI rates higher overall.

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

Cowsar

34%

of similar heat pumps beaten by its typical model

Well below average

12 models listed

DAIZUKI

47%

of similar heat pumps beaten by its typical model

About average

12 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°FCowsar: Beats 61%DAIZUKI: Beats 39%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FCowsar: Beats 28%DAIZUKI: Beats 41%
  • Winter-long heating efficiencyHSPF2Cowsar: Beats 25%DAIZUKI: Beats 47%
  • Summer-long cooling efficiencySEER2Cowsar: Beats 36%DAIZUKI: Beats 61%
  • Hot-day cooling efficiencyEER2Cowsar: Beats 23%DAIZUKI: Beats 44%

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

    Cowsar
    75%
    DAIZUKI
    92%

  • Xcel CC

    Cowsar
    50%
    DAIZUKI
    75%

  • CEE Advanced

    Cowsar
    0%
    DAIZUKI
    0%

  • ENERGY STAR CC

    Cowsar
    0%
    DAIZUKI
    0%

All-around best, ductless 3.5–4.5 tons

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

Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Cowsar

No ductless, 3.5–4.5 tons model from Cowsar.

DAIZUKI

  1. 1DXFMT-4224-5ZDAIZUKI3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 32.0Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Below the middle
    Cooling efficiency
    22.0 (SEER2)
    Good
    Hot-day cooling
    11.2 (EER2)
    Below the middle
    42.9score / 100Heating 32 · Cooling 54

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