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ACC vs ULTRA MAXI AIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical ACC model beats 55% and a typical ULTRA MAXI AIR model 31%. ACC 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

ULTRA MAXI AIR

31%

of similar heat pumps beaten by its typical model

Well below 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%ULTRA MAXI AIR: Beats 35%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FACC: Beats 77%ULTRA MAXI AIR: Beats 7%
  • Winter-long heating efficiencyHSPF2ACC: Beats 55%ULTRA MAXI AIR: Beats 38%
  • Summer-long cooling efficiencySEER2ACC: Beats 32%ULTRA MAXI AIR: Beats 42%
  • Hot-day cooling efficiencyEER2ACC: Beats 12%ULTRA MAXI AIR: Beats 26%

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%
    ULTRA MAXI AIR
    25%

  • Xcel CC

    ACC
    0%
    ULTRA MAXI AIR
    0%

  • CEE Advanced

    ACC
    0%
    ULTRA MAXI AIR
    0%

  • ENERGY STAR CC

    ACC
    0%
    ULTRA MAXI AIR
    0%

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

ACC

No ducted, 2 tons model from ACC.

ULTRA MAXI AIR

No ducted, 2 tons model from ULTRA MAXI AIR.

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