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COMFORMATIC vs YISO: heat pump ratings compared

Against heat pumps of the same size and type, a typical COMFORMATIC model beats 41% and a typical YISO model 66%. YISO rates higher overall.

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

COMFORMATIC

41%

of similar heat pumps beaten by its typical model

Below average

6 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°FCOMFORMATIC: Beats 35%YISO: Beats 50%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FCOMFORMATIC: Beats 39%YISO: Beats 52%
  • Winter-long heating efficiencyHSPF2COMFORMATIC: Beats 21%YISO: Beats 75%
  • Summer-long cooling efficiencySEER2COMFORMATIC: Beats 55%YISO: Beats 80%
  • Hot-day cooling efficiencyEER2COMFORMATIC: Beats 44%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

    COMFORMATIC
    100%
    YISO
    100%

  • Xcel CC

    COMFORMATIC
    83%
    YISO
    100%

  • CEE Advanced

    COMFORMATIC
    0%
    YISO
    0%

  • ENERGY STAR CC

    COMFORMATIC
    0%
    YISO
    100%

All-around best, ducted 3.5–4.5 tons

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

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

COMFORMATIC

No ducted, 3.5–4.5 tons model from COMFORMATIC.

YISO

  1. 1YRHA1-60ABYISO4.5 tons · 56,000 Btu/h · DuctedCold-climate pick, score 56.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Great
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    11.2 (EER2)
    Good
    63.7score / 100Heating 57 · Cooling 71
  2. 2YRHA1-60BBYISO4.5 tons · 56,000 Btu/h · DuctedCold-climate pick, score 55.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.3 (HSPF2)
    Great
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    11.2 (EER2)
    Good
    63.1score / 100Heating 55 · Cooling 71
  3. 3YOHA3-60DDwith ducted air handler YAHA3-48DEYISO4 tons · 46,000 Btu/h · DuctedCold-climate pick, score 62.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    8.8 (HSPF2)
    Good
    Cooling efficiency
    17.5 (SEER2)
    Good
    Hot-day cooling
    11.2 (EER2)
    Good
    60.7score / 100Heating 58 · Cooling 63

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