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BOREAL vs SLIMAIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical BOREAL model beats 53% and a typical SLIMAIR model 60%. SLIMAIR rates higher overall.

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

BOREAL

53%

of similar heat pumps beaten by its typical model

About average

49 models listed

SLIMAIR

60%

of similar heat pumps beaten by its typical model

Well above average

48 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°FBOREAL: Beats 43%SLIMAIR: Beats 60%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBOREAL: Beats 59%SLIMAIR: Beats 59%
  • Winter-long heating efficiencyHSPF2BOREAL: Beats 41%SLIMAIR: Beats 73%
  • Summer-long cooling efficiencySEER2BOREAL: Beats 59%SLIMAIR: Beats 61%
  • Hot-day cooling efficiencyEER2BOREAL: Beats 58%SLIMAIR: 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

    BOREAL
    88%
    SLIMAIR
    90%

  • Xcel CC

    BOREAL
    88%
    SLIMAIR
    77%

  • CEE Advanced

    BOREAL
    6%
    SLIMAIR
    2%

  • ENERGY STAR CC

    BOREAL
    61%
    SLIMAIR
    79%

Top cold-climate picks, ductless 2.5–3 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, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

BOREAL

  1. 1MUL36HPJ132OABOREAL3 tons · 36,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    77.2score / 100
  2. 2MUL30HPJ132OABOREAL2.5 tons · 28,400 Btu/h · DuctlessKeeps 90% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    90% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.07 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    69.8score / 100
  3. 3BRS36HPJ132OAwith ductless indoor unit FSU36HPJ132IABOREAL3 tons · 33,600 Btu/h · DuctlessKeeps 72% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    8.5 (HSPF2)
    Below the middle
    36.2score / 100

SLIMAIR

  1. 1SHC36AH2AGwith ductless indoor unit SHS36AC2AGSLIMAIR3 tons · 36,400 Btu/h · DuctlessKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.02 (COP at 5°F)
    Great
    Seasonal efficiency
    10.8 (HSPF2)
    Top 10%
    89.4score / 100
  2. 2SHC5Z36AH2AGSLIMAIR3 tons · 36,000 Btu/h · DuctlessKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.95 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.9 (HSPF2)
    Top 10%
    72.6score / 100
  3. 3SHC36AC2AGwith ductless indoor unit SHL36AC2AGSLIMAIR3 tons · 36,000 Btu/h · DuctlessKeeps 70% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.3 (HSPF2)
    Good
    62.8score / 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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