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AOKOL vs Brothers: heat pump ratings compared

One of these brands has too few models with every rating for an overall score; see each rating below.

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

AOKOL

58%

of similar heat pumps beaten by its typical model

Above average

4 models listed

Brothers

—

of similar heat pumps beaten by its typical model

Not enough rated models

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°FAOKOL: Beats 52%Brothers: Not rated
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAOKOL: Beats 41%Brothers: Not rated
  • Winter-long heating efficiencyHSPF2AOKOL: Beats 65%Brothers: Beats 21%
  • Summer-long cooling efficiencySEER2AOKOL: Beats 77%Brothers: Beats 18%
  • Hot-day cooling efficiencyEER2AOKOL: Beats 49%Brothers: Beats 53%

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

    AOKOL
    100%
    Brothers
    0%

  • Xcel CC

    AOKOL
    100%
    Brothers
    0%

  • CEE Advanced

    AOKOL
    0%
    Brothers
    0%

  • ENERGY STAR CC

    AOKOL
    100%
    Brothers
    0%

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?

AOKOL

  1. 1AOODU-1D5SAOKOL3.5 tons · 42,000 Btu/h · DuctlessKeeps 71% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Below the middle
    31.2score / 100

Brothers

No ductless, 3.5–4.5 tons model from Brothers.

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