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AIRTEMP vs SLIMAIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical AIRTEMP model beats 45% and a typical SLIMAIR model 59%. SLIMAIR rates higher overall.

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

AIRTEMP

45%

of similar heat pumps beaten by its typical model

About average

25 models listed

SLIMAIR

59%

of similar heat pumps beaten by its typical model

Above average

54 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°FAIRTEMP: Beats 32%SLIMAIR: Beats 47%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAIRTEMP: Beats 65%SLIMAIR: Beats 58%
  • Winter-long heating efficiencyHSPF2AIRTEMP: Beats 37%SLIMAIR: Beats 71%
  • Summer-long cooling efficiencySEER2AIRTEMP: Beats 38%SLIMAIR: Beats 65%
  • Hot-day cooling efficiencyEER2AIRTEMP: Beats 44%SLIMAIR: Beats 49%

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

    AIRTEMP
    48%
    SLIMAIR
    67%

  • Xcel CC

    AIRTEMP
    52%
    SLIMAIR
    50%

  • CEE Advanced

    AIRTEMP
    0%
    SLIMAIR
    2%

  • ENERGY STAR CC

    AIRTEMP
    32%
    SLIMAIR
    43%

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?

AIRTEMP

  1. 1GXH24(7.0)FMK4DH-1AIRTEMP2 tons · 23,200 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)
    Great
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    76.1score / 100
  2. 2GXH24(7.0)LSK4DHwith ductless indoor unit GHH24(7.0)LUK4DHAIRTEMP2 tons · 22,000 Btu/h · DuctlessKeeps 83% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.75 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    8.5 (HSPF2)
    Below the middle
    28.9score / 100

SLIMAIR

  1. 1SHC24VH2AGwith ductless indoor unit SHLZ24VC2AGSLIMAIR2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (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%
    86.1score / 100
  2. 2SHCD24VC2AGwith ductless indoor unit SHMZ24VC2AGSLIMAIR2 tons · 23,000 Btu/h · DuctlessKeeps 88% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    88% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.3 (HSPF2)
    Great
    61.1score / 100
  3. 3SHC24VE2AGwith ductless indoor unit SHLZ24VC2AGSLIMAIR2 tons · 24,000 Btu/h · DuctlessKeeps 76% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.96 (COP at 5°F)
    Good
    Seasonal efficiency
    9.7 (HSPF2)
    Good
    59.3score / 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