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LG vs MRCOOL: heat pump ratings compared

Against heat pumps of the same size and type, a typical LG model beats 56% and a typical MRCOOL model 53%. LG rates slightly higher overall.

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

LG

56%

of similar heat pumps beaten by its typical model

Above average

100 models listed

MRCOOL

53%

of similar heat pumps beaten by its typical model

About average

92 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°FLG: Beats 56%MRCOOL: Beats 50%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FLG: Beats 57%MRCOOL: Beats 50%
  • Winter-long heating efficiencyHSPF2LG: Beats 51%MRCOOL: Beats 56%
  • Summer-long cooling efficiencySEER2LG: Beats 49%MRCOOL: Beats 54%
  • Hot-day cooling efficiencyEER2LG: Beats 64%MRCOOL: Beats 49%

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

    LG
    86%
    MRCOOL
    67%

  • Xcel CC

    LG
    78%
    MRCOOL
    58%

  • CEE Advanced

    LG
    11%
    MRCOOL
    0%

  • ENERGY STAR CC

    LG
    64%
    MRCOOL
    57%

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?

LG

  1. 1KUMXA421ALG3.5 tons · 42,000 Btu/h · DuctedCold-climate pick, score 89.3Meets 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
    2.27 (COP at 5°F)
    Great
    Winter efficiency
    10.0 (HSPF2)
    Great
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    13.1 (EER2)
    Top 10%
    91.2score / 100Heating 89 · Cooling 93
  2. 2KUMXA481ALG4 tons · 48,000 Btu/h · DuctedCold-climate pick, score 90.4Meets 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
    2.33 (COP at 5°F)
    Great
    Winter efficiency
    10.0 (HSPF2)
    Great
    Cooling efficiency
    18.5 (SEER2)
    Great
    Hot-day cooling
    12.6 (EER2)
    Top 10%
    90.1score / 100Heating 90 · Cooling 90
  3. 3KUSXA422Awith ducted air handler MSVT48***964GAALG3.5 tons · 41,000 Btu/h · DuctedCold-climate pick, score 79.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    110% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    9.8 (HSPF2)
    Great
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    12.5 (EER2)
    Top 10%
    85.5score / 100Heating 80 · Cooling 91

MRCOOL

  1. 1MULTI6-48HP230C-OMRCOOL4 tons · 45,000 Btu/h · DuctedCold-climate pick, score 77.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    81% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Winter efficiency
    10.6 (HSPF2)
    Top 10%
    Cooling efficiency
    20.4 (SEER2)
    Top 10%
    Hot-day cooling
    12.0 (EER2)
    Great
    85.1score / 100Heating 78 · Cooling 92
  2. 2DIY-MULTI6-55HP230D-OMRCOOL4 tons · 47,000 Btu/h · DuctedCold-climate pick, score 73.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    84% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.5 (HSPF2)
    Top 10%
    Cooling efficiency
    20.0 (SEER2)
    Top 10%
    Hot-day cooling
    12.0 (EER2)
    Great
    81.6score / 100Heating 73 · Cooling 90
  3. 3DIY-MULTI6-48HP230D-OMRCOOL3.5 tons · 43,000 Btu/h · DuctedCold-climate pick, score 70.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    79% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.5 (HSPF2)
    Top 10%
    Cooling efficiency
    20.0 (SEER2)
    Top 10%
    Hot-day cooling
    12.0 (EER2)
    Great
    80.2score / 100Heating 71 · Cooling 90

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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