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Nortek Global HVAC vs ZERO: heat pump ratings compared

Against heat pumps of the same size and type, a typical Nortek Global HVAC model beats 31% and a typical ZERO model 53%. ZERO rates higher overall.

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

Nortek Global HVAC

31%

of similar heat pumps beaten by its typical model

Well below average

109 models listed

ZERO

53%

of similar heat pumps beaten by its typical model

About average

119 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°FNortek Global HVAC: Beats 23%ZERO: Beats 45%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FNortek Global HVAC: Beats 28%ZERO: Beats 52%
  • Winter-long heating efficiencyHSPF2Nortek Global HVAC: Beats 28%ZERO: Beats 57%
  • Summer-long cooling efficiencySEER2Nortek Global HVAC: Beats 32%ZERO: Beats 58%
  • Hot-day cooling efficiencyEER2Nortek Global HVAC: Beats 42%ZERO: Beats 48%

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

    Nortek Global HVAC
    28%
    ZERO
    71%

  • Xcel CC

    Nortek Global HVAC
    20%
    ZERO
    65%

  • CEE Advanced

    Nortek Global HVAC
    2%
    ZERO
    0%

  • ENERGY STAR CC

    Nortek Global HVAC
    11%
    ZERO
    53%

All-around best, ductless 2 tons

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

Showing Ductless, 2 tons (21,000–26,999 Btu/h cooling). What size is my system?

Nortek Global HVAC

  1. 1DXH24PSK3IHwith ductless indoor unit DHH24PUK3IHNortek Global HVAC (sold as Gibson)2 tons · 22,000 Btu/h · DuctlessCold-climate pick, score 50.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    79% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    26.0 (SEER2)
    Top 10%
    Hot-day cooling
    13.7 (EER2)
    Top 10%
    72.2score / 100Heating 50 · Cooling 94
  2. 2DXH24FMK3IHNortek Global HVAC (sold as Gibson)2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 67.5Meets 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
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    13.3 (EER2)
    Great
    67.6score / 100Heating 68 · Cooling 68
  3. 3WHS24SZB21Swith ductless indoor unit WHS24WMB21SNortek Global HVAC (sold as Westinghouse)2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 38.8Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.98 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.0 (HSPF2)
    Below the middle
    Cooling efficiency
    19.5 (SEER2)
    Below the middle
    Hot-day cooling
    10.6 (EER2)
    Below the middle
    34.1score / 100Heating 39 · Cooling 29

ZERO

  1. 1ZMSB-24HV-USHHR2-Owith ductless indoor unit ZMSB-24HV-USHHR2-IZERO2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 73.7Meets 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
    2.15 (COP at 5°F)
    Great
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.5 (SEER2)
    Top 10%
    Hot-day cooling
    13.0 (EER2)
    Great
    74.3score / 100Heating 64 · Cooling 85
  2. 2ZMSB-24HV-USHHCR2-Owith ductless indoor unit ZMSB-24HV-USHHCR2-IZERO2 tons · 23,000 Btu/h · DuctlessCold-climate pick, score 77.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR 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
    13.3 (HSPF2)
    Top 10%
    Cooling efficiency
    22.3 (SEER2)
    Good
    Hot-day cooling
    12.5 (EER2)
    Good
    72.9score / 100Heating 77 · Cooling 69
  3. 3ZMSB-24HVT-USR1-S23-Owith ductless indoor unit ZMSB-24HVT-USR1-S23-IZERO2 tons · 23,000 Btu/h · DuctlessCold-climate pick, score 61.6Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    73% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.0 (SEER2)
    Great
    Hot-day cooling
    12.0 (EER2)
    Good
    64.8score / 100Heating 62 · Cooling 68

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