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DIYCOOL vs LG: heat pump ratings compared

Against heat pumps of the same size and type, a typical DIYCOOL model beats 54% and a typical LG model 56%. LG rates slightly 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

LG

56%

of similar heat pumps beaten by its typical model

Above average

100 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%LG: Beats 56%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDIYCOOL: Beats 51%LG: Beats 57%
  • Winter-long heating efficiencyHSPF2DIYCOOL: Beats 63%LG: Beats 51%
  • Summer-long cooling efficiencySEER2DIYCOOL: Beats 60%LG: Beats 49%
  • Hot-day cooling efficiencyEER2DIYCOOL: Beats 47%LG: 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

    DIYCOOL
    79%
    LG
    86%

  • Xcel CC

    DIYCOOL
    71%
    LG
    78%

  • CEE Advanced

    DIYCOOL
    4%
    LG
    11%

  • ENERGY STAR CC

    DIYCOOL
    75%
    LG
    64%

All-around best, ductless 3.5–4.5 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating 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 · DuctlessCold-climate pick, score 45.0Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    77% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Below the middle
    Cooling efficiency
    21.8 (SEER2)
    Good
    Hot-day cooling
    12.0 (EER2)
    Good
    52.8score / 100Heating 37 · Cooling 69

LG

  1. 1KUMXA421ALG3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 95.9Meets 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)
    Top 10%
    Efficiency at 5°F
    2.29 (COP at 5°F)
    Top 10%
    Winter efficiency
    11.0 (HSPF2)
    Top 10%
    Cooling efficiency
    21.5 (SEER2)
    Good
    Hot-day cooling
    13.8 (EER2)
    Top 10%
    89.3score / 100Heating 96 · Cooling 83
  2. 2ZRUM048GSS0LG4 tons · 48,000 Btu/h · DuctlessCold-climate pick, score 80.2Meets 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)
    Top 10%
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Winter efficiency
    10.3 (HSPF2)
    Good
    Cooling efficiency
    23.3 (SEER2)
    Top 10%
    Hot-day cooling
    13.5 (EER2)
    Top 10%
    88.5score / 100Heating 80 · Cooling 97
  3. 3KUSXA421Awith ductless indoor unit KNSCB421ALG3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 88.6Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    91% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Top 10%
    Winter efficiency
    10.8 (HSPF2)
    Great
    Cooling efficiency
    21.5 (SEER2)
    Good
    Hot-day cooling
    13.5 (EER2)
    Top 10%
    85.6score / 100Heating 89 · Cooling 83

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