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Gridless vs ISLANDAIRE: heat pump ratings compared

Against heat pumps of the same size and type, a typical Gridless model beats 70% and a typical ISLANDAIRE model 17%. Gridless rates higher overall.

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

Gridless

70%

of similar heat pumps beaten by its typical model

Well above average

15 models listed

ISLANDAIRE

17%

of similar heat pumps beaten by its typical model

Well below average

15 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°FGridless: Beats 64%ISLANDAIRE: Beats 22%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FGridless: Beats 73%ISLANDAIRE: Beats 17%
  • Winter-long heating efficiencyHSPF2Gridless: Beats 62%ISLANDAIRE: Beats 5%
  • Summer-long cooling efficiencySEER2Gridless: Beats 73%ISLANDAIRE: Beats 19%
  • Hot-day cooling efficiencyEER2Gridless: Beats 73%ISLANDAIRE: Beats 20%

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

    Gridless
    100%
    ISLANDAIRE
    0%

  • Xcel CC

    Gridless
    100%
    ISLANDAIRE
    0%

  • CEE Advanced

    Gridless
    13%
    ISLANDAIRE
    0%

  • ENERGY STAR CC

    Gridless
    100%
    ISLANDAIRE
    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?

Gridless

  1. 1GRID09OHHVwith ductless indoor unit GRID09WHHVGridless1 ton · 9,000 Btu/h · DuctlessCold-climate pick, score 89.7Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Winter efficiency
    11.8 (HSPF2)
    Top 10%
    Cooling efficiency
    32.0 (SEER2)
    Top 10%
    Hot-day cooling
    18.4 (EER2)
    Top 10%
    94.5score / 100Heating 90 · Cooling 99
  2. 2GRID12OHHVwith ductless indoor unit GRID12WHHVGridless1 ton · 12,000 Btu/h · DuctlessCold-climate pick, score 89.7Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Winter efficiency
    11.8 (HSPF2)
    Top 10%
    Cooling efficiency
    30.0 (SEER2)
    Top 10%
    Hot-day cooling
    15.4 (EER2)
    Top 10%
    93.4score / 100Heating 90 · Cooling 97
  3. 3GRID15OHHVwith ductless indoor unit GRID15WHHVGridless1.5 tons · 15,000 Btu/h · DuctlessCold-climate pick, score 80.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    80% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Winter efficiency
    11.1 (HSPF2)
    Great
    Cooling efficiency
    25.6 (SEER2)
    Top 10%
    Hot-day cooling
    13.7 (EER2)
    Great
    84.2score / 100Heating 81 · Cooling 88

ISLANDAIRE

No ductless, up to 1.5 tons model from ISLANDAIRE.

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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