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ACC vs Maestrale: heat pump ratings compared

Against heat pumps of the same size and type, a typical ACC model beats 55% and a typical Maestrale model 64%. Maestrale rates higher overall.

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

ACC

55%

of similar heat pumps beaten by its typical model

About average

4 models listed

Maestrale

64%

of similar heat pumps beaten by its typical model

Well above average

4 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°FACC: Beats 67%Maestrale: Beats 51%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FACC: Beats 77%Maestrale: Beats 65%
  • Winter-long heating efficiencyHSPF2ACC: Beats 55%Maestrale: Beats 55%
  • Summer-long cooling efficiencySEER2ACC: Beats 32%Maestrale: Beats 69%
  • Hot-day cooling efficiencyEER2ACC: Beats 12%Maestrale: Beats 72%

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

    ACC
    0%
    Maestrale
    100%

  • Xcel CC

    ACC
    0%
    Maestrale
    100%

  • CEE Advanced

    ACC
    0%
    Maestrale
    0%

  • ENERGY STAR CC

    ACC
    0%
    Maestrale
    0%

Top cold-climate picks, ductless 2 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 tons (21,000–26,999 Btu/h cooling). What size is my system?

ACC

No ductless, 2 tons model from ACC.

Maestrale

  1. 1TSB24MBOR3J0X24Maestrale2 tons · 24,000 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)
    Great
    Efficiency at 5°F
    1.84 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.1 (HSPF2)
    Good
    64.4score / 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.

Open the advanced view