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ACIQ vs Mitsubishi Electric: heat pump ratings compared

Against heat pumps of the same size and type, a typical ACIQ model beats 47% 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

ACIQ

47%

of similar heat pumps beaten by its typical model

About average

161 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°FACIQ: Beats 48%Mitsubishi Electric: Beats 67%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FACIQ: Beats 43%Mitsubishi Electric: Beats 55%
  • Winter-long heating efficiencyHSPF2ACIQ: Beats 44%Mitsubishi Electric: Beats 72%
  • Summer-long cooling efficiencySEER2ACIQ: Beats 45%Mitsubishi Electric: Beats 63%
  • Hot-day cooling efficiencyEER2ACIQ: Beats 50%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

    ACIQ
    41%
    Mitsubishi Electric
    68%

  • Xcel CC

    ACIQ
    32%
    Mitsubishi Electric
    54%

  • CEE Advanced

    ACIQ
    1%
    Mitsubishi Electric
    6%

  • ENERGY STAR CC

    ACIQ
    19%
    Mitsubishi Electric
    37%

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

ACIQ

  1. 1ACIQ-60ZPL-HP230Bwith ductless indoor unit ACIQ-60FM-HH-MBACIQ4.5 tons · 55,000 Btu/h · DuctlessKeeps 94% of its heat at 5°FMeets Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    94% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.97 (COP at 5°F)
    Good
    Seasonal efficiency
    10.2 (HSPF2)
    Great
    76.8score / 100
  2. 2ACIQ-48Z-HH-M5BACIQ4 tons · 48,000 Btu/h · DuctlessKeeps 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)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    9.8 (HSPF2)
    Good
    76.2score / 100
  3. 3ACIQ-48ZPL-HP230Bwith ductless indoor unit ACIQ-48CC-HH-MBACIQ4 tons · 48,000 Btu/h · DuctlessKeeps 91% of its heat at 5°FMeets ENERGY STAR CC
    Heat kept at 5°F
    91% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.98 (COP at 5°F)
    Good
    Seasonal efficiency
    10.7 (HSPF2)
    Top 10%
    76.0score / 100

Mitsubishi Electric

  1. 1PUMY-HP48NKMU1Mitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH48A182A; also listed as MXZ-SM48NAMHZ4 tons · 48,000 Btu/h · DuctlessKeeps 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
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    90.4score / 100
  2. 2MXZ-SM42NAMHZ2Mitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH42A152B; also listed as PUMY-HP42NKMU23.5 tons · 42,000 Btu/h · DuctlessKeeps 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)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.1 (HSPF2)
    Top 10%
    83.9score / 100
  3. 3MXZ-SM42NAMHZ***Mitsubishi ElectricAlso sold as Trane / Mitsubishi Electric NTXMSH42A152A, Trane / Mitsubishi Electric NTXMSH42A152B; also listed as MXZ-SM42NAMHZ23.5 tons · 42,000 Btu/h · DuctlessKeeps 92% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    92% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.1 (HSPF2)
    Top 10%
    83.6score / 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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