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Lennox vs Mitsubishi Electric: heat pump ratings compared

Against heat pumps of the same size and type, a typical Lennox model beats 56% and a typical Mitsubishi Electric model 65%. Mitsubishi Electric rates higher overall.

Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated

Lennox

56%

of similar heat pumps beaten by its typical model

Above average

313 models listed

Mitsubishi Electric

65%

of similar heat pumps beaten by its typical model

Well above average

373 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°FLennox: Beats 58%Mitsubishi Electric: Beats 67%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FLennox: Beats 48%Mitsubishi Electric: Beats 55%
  • Winter-long heating efficiencyHSPF2Lennox: Beats 49%Mitsubishi Electric: Beats 72%
  • Summer-long cooling efficiencySEER2Lennox: Beats 49%Mitsubishi Electric: Beats 63%
  • Hot-day cooling efficiencyEER2Lennox: Beats 54%Mitsubishi Electric: Beats 65%

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

    Lennox
    46%
    Mitsubishi Electric
    68%

  • Xcel CC

    Lennox
    29%
    Mitsubishi Electric
    54%

  • CEE Advanced

    Lennox
    1%
    Mitsubishi Electric
    6%

  • ENERGY STAR CC

    Lennox
    20%
    Mitsubishi Electric
    37%

Top cold-climate picks, ducted 3.5–4.5 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 Ducted, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Lennox

  1. 1MLB048S4S-1Pwith ducted air handler MMDB048S4-2PLennox4 tons · 48,000 Btu/h · DuctedKeeps 96% of its heat at 5°FMeets ENERGY STAR CC
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.02 (COP at 5°F)
    Good
    Seasonal efficiency
    10.3 (HSPF2)
    Top 10%
    88.9score / 100
  2. 2MLB048S4S-2Pwith ducted air handler MMDB048S4-*PLennox4 tons · 48,000 Btu/h · DuctedKeeps 96% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.02 (COP at 5°F)
    Good
    Seasonal efficiency
    10.2 (HSPF2)
    Top 10%
    88.6score / 100
  3. 3SL25XPV-048-230A**with ducted air handler CBA38MV-048-230*+TDRLennox4 tons · 46,000 Btu/h · DuctedKeeps 80% of its heat at 5°FMeets 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
    1.98 (COP at 5°F)
    Good
    Seasonal efficiency
    9.8 (HSPF2)
    Top 10%
    76.8score / 100

Mitsubishi Electric

  1. 1MXZ-SM42NAMHZMitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH42A152A3.5 tons · 42,000 Btu/h · DuctedKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Top 10%
    79.2score / 100
  2. 2PUMY-HP48NKMU1Mitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH48A182A; also listed as MXZ-SM48NAMHZ4 tons · 48,000 Btu/h · DuctedKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.5 (HSPF2)
    Top 10%
    77.3score / 100
  3. 3MXZ-SM42NAMHZ2Mitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH42A152B3.5 tons · 42,000 Btu/h · DuctedKeeps 92% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    92% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.86 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Top 10%
    74.6score / 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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