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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 2.5–3 tons

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

Showing Ductless, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

Nortek Global HVAC

  1. 1DXH30FMK3IHNortek Global HVAC (sold as Gibson)2.5 tons · 28,400 Btu/h · DuctlessCold-climate pick, score 69.8Meets 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
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    13.6 (EER2)
    Top 10%
    70.5score / 100Heating 70 · Cooling 71
  2. 2DXH36FMK3IHNortek Global HVAC (sold as Gibson)3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 77.2Meets 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
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    12.0 (EER2)
    Good
    64.5score / 100Heating 77 · Cooling 52
  3. 3DXH36ESK3ILwith ductless indoor unit DHH36ESK3ILNortek Global HVAC (sold as Gibson)3 tons · 33,600 Btu/h · DuctlessCold-climate pick, score 22.3Meets 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
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.5 (HSPF2)
    Below the middle
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    12.0 (EER2)
    Good
    37.0score / 100Heating 22 · Cooling 52

ZERO

  1. 1Z4SOV-36HDMB-USHHZERO3 tons · 36,000 Btu/h · DuctlessCold-climate pick, score 72.6Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Winter efficiency
    11.3 (HSPF2)
    Top 10%
    Cooling efficiency
    21.5 (SEER2)
    Good
    Hot-day cooling
    12.2 (EER2)
    Good
    66.3score / 100Heating 70 · Cooling 62
  2. 2Z3SOV-27HDTB-USZERO2.5 tons · 27,000 Btu/h · DuctlessCold-climate pick, score 57.5Meets 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)
    Good
    Winter efficiency
    10.5 (HSPF2)
    Great
    Cooling efficiency
    24.0 (SEER2)
    Top 10%
    Hot-day cooling
    12.0 (EER2)
    Good
    65.1score / 100Heating 58 · Cooling 73
  3. 3Z4SOV-36HDMB-USZEROAlso listed as Z5SOV-36HDMB-US3 tons · 35,000 Btu/h · DuctlessCold-climate pick, score 47.2Meets 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
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.1 (SEER2)
    Great
    Hot-day cooling
    12.0 (EER2)
    Good
    58.3score / 100Heating 47 · Cooling 69

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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