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DiamondAir vs Nutech: heat pump ratings compared

One of these brands has too few models with every rating for an overall score; see each rating below.

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

DiamondAir

—

of similar heat pumps beaten by its typical model

Not enough rated models

7 models listed

Nutech

54%

of similar heat pumps beaten by its typical model

About average

28 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°FDiamondAir: Not ratedNutech: Beats 58%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDiamondAir: Not ratedNutech: Beats 42%
  • Winter-long heating efficiencyHSPF2DiamondAir: Beats 26%Nutech: Beats 60%
  • Summer-long cooling efficiencySEER2DiamondAir: Beats 21%Nutech: Beats 64%
  • Hot-day cooling efficiencyEER2DiamondAir: Beats 60%Nutech: Beats 43%

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

    DiamondAir
    0%
    Nutech
    86%

  • Xcel CC

    DiamondAir
    0%
    Nutech
    61%

  • CEE Advanced

    DiamondAir
    0%
    Nutech
    0%

  • ENERGY STAR CC

    DiamondAir
    0%
    Nutech
    0%

Top cold-climate picks, ducted up to 1.5 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 Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

DiamondAir

None of DiamondAir’s ducted, up to 1.5 tons models qualifies.

Nutech

  1. 1NOX230-09HFN10-M1with ducted air handler NTJ-09HWFN10-M1-DNutech1 ton · 9,000 Btu/h · DuctedKeeps 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
    2.32 (COP at 5°F)
    Great
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    81.3score / 100
  2. 2NOX230-12HFN10-M1with ducted air handler NTJ-12HWFN10-M1-DNutech1 ton · 12,000 Btu/h · DuctedKeeps 74% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    74% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.44 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    77.3score / 100
  3. 3N3OX430-18HFN10-M1-DNutech1.5 tons · 18,000 Btu/h · DuctedKeeps 77% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    77% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.30 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Great
    72.6score / 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