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Gree vs Rheem: heat pump ratings compared

Against heat pumps of the same size and type, a typical Gree model beats 54% and a typical Rheem model 49%. Gree rates slightly higher overall.

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

Gree

54%

of similar heat pumps beaten by its typical model

About average

717 models listed

Rheem

49%

of similar heat pumps beaten by its typical model

About average

341 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°FGree: Beats 43%Rheem: Beats 59%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FGree: Beats 57%Rheem: Beats 48%
  • Winter-long heating efficiencyHSPF2Gree: Beats 42%Rheem: Beats 43%
  • Summer-long cooling efficiencySEER2Gree: Beats 60%Rheem: Beats 42%
  • Hot-day cooling efficiencyEER2Gree: Beats 60%Rheem: Beats 40%

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

    Gree
    81%
    Rheem
    36%

  • Xcel CC

    Gree
    80%
    Rheem
    34%

  • CEE Advanced

    Gree
    6%
    Rheem
    2%

  • ENERGY STAR CC

    Gree
    66%
    Rheem
    33%

Top cold-climate picks, ductless 2.5–3 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.

Showing Ductless, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

Gree

  1. 1GWHD(36)ND6MOGreeAlso sold as Tosot TM36H32MO, Kinghome KM36X6O, Tosot MZ-COSMO36/O, Tosot TM36D6MO and 6 more; also listed as MUL36HP230V1R32AO, GS4M36HP230V1MO, GWHD(36)ND6CO3 tons · 36,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets 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
    2.10 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    77.2score / 100
  2. 2GWHD(30)ND6MOGreeAlso sold as Tosot TM30H32MO, Kinghome KM30X6O, Tosot MZ-COSMO30/O, Tosot TM30D6MO and 6 more; also listed as MUL30HP230V1R32AO, GS4M30HP230V1MO2.5 tons · 28,400 Btu/h · DuctlessKeeps 90% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    90% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.07 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    69.8score / 100
  3. 3MHPC-H-036BSBwith ductless indoor unit M4CS-H-036BSBGree (sold as Ac Pro)3 tons · 36,000 Btu/h · DuctlessKeeps 70% of its heat at 5°FMeets Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.3 (HSPF2)
    Good
    62.8score / 100

Rheem

  1. 1ML36HP230LCMH-Owith ductless indoor unit ML36HP230FLO-IRheem (sold as Mainline)3 tons · 36,400 Btu/h · DuctlessKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.02 (COP at 5°F)
    Great
    Seasonal efficiency
    10.8 (HSPF2)
    Top 10%
    89.4score / 100
  2. 2ML36HP230MULH-O*Rheem (sold as Mainline)Also listed as ML36HP230MULH - O3 tons · 36,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.6 (HSPF2)
    Great
    78.0score / 100
  3. 3ML27HP230MULH-O*Rheem (sold as Mainline)Also listed as ML27HP230MULH - O2.5 tons · 27,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR 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
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    72.9score / 100

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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