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Air Tempo vs GENERALLUX STAR: heat pump ratings compared

Against heat pumps of the same size and type, a typical Air Tempo model beats 64% and a typical GENERALLUX STAR model 50%. Air Tempo rates higher overall.

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

Air Tempo

64%

of similar heat pumps beaten by its typical model

Well above average

6 models listed

GENERALLUX STAR

50%

of similar heat pumps beaten by its typical model

About average

6 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°FAir Tempo: Beats 18%GENERALLUX STAR: Beats 55%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAir Tempo: Beats 86%GENERALLUX STAR: Beats 60%
  • Winter-long heating efficiencyHSPF2Air Tempo: Beats 72%GENERALLUX STAR: Beats 42%
  • Summer-long cooling efficiencySEER2Air Tempo: Beats 78%GENERALLUX STAR: Beats 48%
  • Hot-day cooling efficiencyEER2Air Tempo: Beats 60%GENERALLUX STAR: Beats 47%

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

    Air Tempo
    100%
    GENERALLUX STAR
    100%

  • Xcel CC

    Air Tempo
    100%
    GENERALLUX STAR
    83%

  • CEE Advanced

    Air Tempo
    0%
    GENERALLUX STAR
    0%

  • ENERGY STAR CC

    Air Tempo
    100%
    GENERALLUX STAR
    0%

All-around best, ductless up to 1.5 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

Showing Ductless, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

Air Tempo

  1. 1ATCB12K454B-Owith ductless indoor unit ATCB12K454B-IAir TempoAlso listed as ATCB12K454B-O1 ton · 12,000 Btu/h · DuctlessCold-climate pick, score 62.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.5 (HSPF2)
    Great
    Cooling efficiency
    25.0 (SEER2)
    Great
    Hot-day cooling
    14.0 (EER2)
    Great
    74.4score / 100Heating 62 · Cooling 87
  2. 2ATCB18K454B-Owith ductless indoor unit ATCB18K454B-IAir TempoAlso listed as ATCB18K454B-O1.5 tons · 18,000 Btu/h · DuctlessCold-climate pick, score 55.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    99% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.5 (SEER2)
    Great
    Hot-day cooling
    12.5 (EER2)
    Good
    61.2score / 100Heating 56 · Cooling 67

GENERALLUX STAR

  1. 1GNS12HCH23R454Owith ductless indoor unit GNS12HCH23R454IGENERALLUX STAR1 ton · 12,000 Btu/h · DuctlessCold-climate pick, score 68.4Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    92% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.0 (SEER2)
    Good
    Hot-day cooling
    12.3 (EER2)
    Good
    64.1score / 100Heating 68 · Cooling 60
  2. 2GNS18HCH21R454Owith ductless indoor unit GNS18HCH21R454IGENERALLUX STAR1.5 tons · 18,000 Btu/h · DuctlessCold-climate pick, score 65.0Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    13.0 (EER2)
    Good
    60.2score / 100Heating 65 · Cooling 55
  3. 3GNS18HCH21R32Owith ductless indoor unit GNS18HCH21R32IGENERALLUX STAR1.5 tons · 18,000 Btu/h · DuctlessCold-climate pick, score 69.0Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.49 (COP at 5°F)
    Top 10%
    Winter efficiency
    9.8 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    12.0 (EER2)
    Below the middle
    55.3score / 100Heating 69 · Cooling 42

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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