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ENVIAIR vs Everwell: heat pump ratings compared

Against heat pumps of the same size and type, a typical ENVIAIR model beats 53% and a typical Everwell model 27%. ENVIAIR rates higher overall.

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

ENVIAIR

53%

of similar heat pumps beaten by its typical model

About average

14 models listed

Everwell

27%

of similar heat pumps beaten by its typical model

Well below average

14 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°FENVIAIR: Beats 44%Everwell: Beats 37%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FENVIAIR: Beats 60%Everwell: Beats 20%
  • Winter-long heating efficiencyHSPF2ENVIAIR: Beats 42%Everwell: Beats 28%
  • Summer-long cooling efficiencySEER2ENVIAIR: Beats 57%Everwell: Beats 26%
  • Hot-day cooling efficiencyEER2ENVIAIR: Beats 57%Everwell: Beats 30%

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

    ENVIAIR
    86%
    Everwell
    14%

  • Xcel CC

    ENVIAIR
    86%
    Everwell
    14%

  • CEE Advanced

    ENVIAIR
    14%
    Everwell
    0%

  • ENERGY STAR CC

    ENVIAIR
    0%
    Everwell
    0%

All-around best, ductless up to 1.5 tons

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

Showing Ductless, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

ENVIAIR

  1. 1EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230AENVIAIR1 ton · 9,100 Btu/h · DuctlessCold-climate pick, score 87.2Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP
    Heat kept at 5°F
    108% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.11 (COP at 5°F)
    Great
    Winter efficiency
    11.2 (HSPF2)
    Great
    Cooling efficiency
    30.0 (SEER2)
    Top 10%
    Hot-day cooling
    16.8 (EER2)
    Top 10%
    92.6score / 100Heating 87 · Cooling 98
  2. 2EMSO28S12AY230Awith ductless indoor unit EMSI28S12AY230AENVIAIR1 ton · 12,000 Btu/h · DuctlessCold-climate pick, score 72.1Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    29.5 (SEER2)
    Top 10%
    Hot-day cooling
    15.2 (EER2)
    Top 10%
    84.3score / 100Heating 72 · Cooling 97
  3. 3EMSO28S18AY230Awith ductless indoor unit EMSI28S18AY230AENVIAIR1.5 tons · 18,000 Btu/h · DuctlessCold-climate pick, score 55.4Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    97% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    27.5 (SEER2)
    Top 10%
    Hot-day cooling
    14.3 (EER2)
    Great
    73.8score / 100Heating 55 · Cooling 92

Everwell

  1. 1MKTH1215C-17with ductless indoor unit MKTH1215E-17Everwell1 ton · 11,500 Btu/h · DuctlessNot a cold-climate pick: keeps 69% of its heat at 5°FMeets 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
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Below the middle
    Cooling efficiency
    17.0 (SEER2)
    Below the middle
    Hot-day cooling
    9.5 (EER2)
    Below the middle
    22.1score / 100Heating 36 · Cooling 8
  2. 2MKTH1825C-17with ductless indoor unit MKTH1825E-17Everwell1.5 tons · 17,000 Btu/h · DuctlessNot a cold-climate pick: keeps 57% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    58% (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
    8.5 (HSPF2)
    Below the middle
    Cooling efficiency
    17.0 (SEER2)
    Below the middle
    Hot-day cooling
    9.5 (EER2)
    Below the middle
    9.5score / 100Heating 11 · Cooling 8
  3. 3MKTH1225C-17with ductless indoor unit MKTH1225E-17Everwell1 ton · 11,500 Btu/h · DuctlessNot a cold-climate pick: keeps 60% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    61% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.75 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.5 (HSPF2)
    Below the middle
    Cooling efficiency
    17.0 (SEER2)
    Below the middle
    Hot-day cooling
    9.5 (EER2)
    Below the middle
    7.9score / 100Heating 8 · Cooling 8

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.

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