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Clima Smart vs YISO: heat pump ratings compared

Against heat pumps of the same size and type, a typical Clima Smart model beats 73% and a typical YISO model 66%. Clima Smart rates higher overall.

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

Clima Smart

73%

of similar heat pumps beaten by its typical model

Well above average

8 models listed

YISO

66%

of similar heat pumps beaten by its typical model

Well above average

7 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°FClima Smart: Beats 35%YISO: Beats 50%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FClima Smart: Beats 79%YISO: Beats 52%
  • Winter-long heating efficiencyHSPF2Clima Smart: Beats 68%YISO: Beats 75%
  • Summer-long cooling efficiencySEER2Clima Smart: Beats 89%YISO: Beats 80%
  • Hot-day cooling efficiencyEER2Clima Smart: Beats 80%YISO: Beats 64%

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

    Clima Smart
    100%
    YISO
    100%

  • Xcel CC

    Clima Smart
    100%
    YISO
    100%

  • CEE Advanced

    Clima Smart
    0%
    YISO
    0%

  • ENERGY STAR CC

    Clima Smart
    100%
    YISO
    100%

Top cold-climate picks, ductless 2.5–3 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, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

Clima Smart

  1. 1MU-CSU27HEI2NAM0T24-4POClima Smart2.5 tons · 27,000 Btu/h · DuctlessKeeps 96% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    68.0score / 100
  2. 2MU-CSU36HEI2NAM0T24-5POClima Smart3 tons · 36,000 Btu/h · DuctlessKeeps 83% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    57.7score / 100

YISO

No ductless, 2.5–3 tons model from YISO.

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