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DIYCOOL vs ZENAIRE: heat pump ratings compared

Against heat pumps of the same size and type, a typical DIYCOOL model beats 54% and a typical ZENAIRE model 17%. DIYCOOL rates higher overall.

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

DIYCOOL

54%

of similar heat pumps beaten by its typical model

About average

24 models listed

ZENAIRE

17%

of similar heat pumps beaten by its typical model

Well below average

24 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°FDIYCOOL: Beats 53%ZENAIRE: Beats 73%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDIYCOOL: Beats 51%ZENAIRE: Beats 0%
  • Winter-long heating efficiencyHSPF2DIYCOOL: Beats 63%ZENAIRE: Beats 18%
  • Summer-long cooling efficiencySEER2DIYCOOL: Beats 60%ZENAIRE: Beats 17%
  • Hot-day cooling efficiencyEER2DIYCOOL: Beats 47%ZENAIRE: Beats 37%

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

    DIYCOOL
    79%
    ZENAIRE
    0%

  • Xcel CC

    DIYCOOL
    71%
    ZENAIRE
    0%

  • CEE Advanced

    DIYCOOL
    4%
    ZENAIRE
    0%

  • ENERGY STAR CC

    DIYCOOL
    75%
    ZENAIRE
    0%

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?

DIYCOOL

  1. 1EZ-48Z-M5BDIYCOOL3.5 tons · 43,000 Btu/h · DuctlessKeeps 78% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.3 (HSPF2)
    Good
    45.0score / 100

ZENAIRE

No ductless, 3.5–4.5 tons model from ZENAIRE.

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