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DIYCOOL vs Nortek Global HVAC: heat pump ratings compared

Against heat pumps of the same size and type, a typical DIYCOOL model beats 54% and a typical Nortek Global HVAC model 51%. DIYCOOL rates slightly higher overall.

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

DIYCOOL

54%

of similar heat pumps beaten by its typical model

About average

75 models listed

Nortek Global HVAC

51%

of similar heat pumps beaten by its typical model

About average

75 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°FDIYCOOL: Beats 42%Nortek Global HVAC: Beats 44%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDIYCOOL: Beats 62%Nortek Global HVAC: Beats 64%
  • Winter-long heating efficiencyHSPF2DIYCOOL: Beats 62%Nortek Global HVAC: Beats 38%
  • Summer-long cooling efficiencySEER2DIYCOOL: Beats 59%Nortek Global HVAC: Beats 39%
  • Hot-day cooling efficiencyEER2DIYCOOL: Beats 43%Nortek Global HVAC: Beats 46%

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

    DIYCOOL
    65%
    Nortek Global HVAC
    39%

  • Xcel CC

    DIYCOOL
    55%
    Nortek Global HVAC
    41%

  • CEE Advanced

    DIYCOOL
    1%
    Nortek Global HVAC
    0%

  • ENERGY STAR CC

    DIYCOOL
    45%
    Nortek Global HVAC
    29%

All-around best, ducted 2.5–3 tons

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

Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling), the most-listed ducted size. Pick yours above. What size is my system?

DIYCOOL

  1. 1ES-27Z-M3BDIYCOOL2.5 tons · 28,000 Btu/h · DuctedNot a cold-climate pick: keeps 66% of its heat at 5°FMeets CEE 2025, CEE 2026
    Heat kept at 5°F
    67% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    9.2 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Top 10%
    Hot-day cooling
    11.7 (EER2)
    Good
    75.4score / 100Heating 65 · Cooling 86
  2. 2ACIQ-27Z-HH-M3BDIYCOOL2.5 tons · 28,000 Btu/h · DuctedCold-climate pick, score 66.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    89% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Great
    Cooling efficiency
    20.0 (SEER2)
    Top 10%
    Hot-day cooling
    11.7 (EER2)
    Good
    74.6score / 100Heating 67 · Cooling 83
  3. 3ACIQ-36Z-HH-M4BDIYCOOL3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 63.7Meets none of the standards tracked here
    Heat kept at 5°F
    89% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.70 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Top 10%
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    11.7 (EER2)
    Good
    71.2score / 100Heating 64 · Cooling 79

Nortek Global HVAC

  1. 1WHP36M4A21SNortek Global HVAC (sold as Westinghouse)2.5 tons · 32,000 Btu/h · DuctedCold-climate pick, score 69.2Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    113% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.84 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.9 (HSPF2)
    Good
    Cooling efficiency
    19.5 (SEER2)
    Great
    Hot-day cooling
    12.0 (EER2)
    Great
    78.6score / 100Heating 69 · Cooling 88
  2. 2WHU36SZA21Swith ducted air handler WHU36DHA21SNortek Global HVAC (sold as Westinghouse)3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 78.1Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Great
    Winter efficiency
    9.5 (HSPF2)
    Great
    Cooling efficiency
    17.5 (SEER2)
    Good
    Hot-day cooling
    10.9 (EER2)
    Below the middle
    67.6score / 100Heating 78 · Cooling 57
  3. 3WHM36SZA21Swith ducted air handler DC37A44-210LNortek Global HVAC (sold as Westinghouse)2.5 tons · 30,000 Btu/h · DuctedCold-climate pick, score 75.5Meets Xcel CC
    Heat kept at 5°F
    81% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.08 (COP at 5°F)
    Great
    Winter efficiency
    9.4 (HSPF2)
    Great
    Cooling efficiency
    15.5 (SEER2)
    Below the middle
    Hot-day cooling
    11.3 (EER2)
    Good
    63.7score / 100Heating 76 · Cooling 52

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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