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DIAMONDAIR vs Nutech: heat pump ratings compared

Against heat pumps of the same size and type, a typical DIAMONDAIR model beats 42% and a typical Nutech model 51%. Nutech rates higher overall.

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

DIAMONDAIR

42%

of similar heat pumps beaten by its typical model

Below average

25 models listed

Nutech

51%

of similar heat pumps beaten by its typical model

About average

25 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: Beats 30%Nutech: Beats 37%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDIAMONDAIR: Beats 34%Nutech: Beats 42%
  • Winter-long heating efficiencyHSPF2DIAMONDAIR: Beats 42%Nutech: Beats 63%
  • Summer-long cooling efficiencySEER2DIAMONDAIR: Beats 38%Nutech: Beats 68%
  • Hot-day cooling efficiencyEER2DIAMONDAIR: Beats 53%Nutech: Beats 42%

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
    36%
    Nutech
    64%

  • Xcel CC

    DIAMONDAIR
    24%
    Nutech
    32%

  • CEE Advanced

    DIAMONDAIR
    0%
    Nutech
    0%

  • ENERGY STAR CC

    DIAMONDAIR
    0%
    Nutech
    0%

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

DIAMONDAIR

  1. 1D2009SHO2with ductless indoor unit DF2009HMSI2DIAMONDAIR1 ton · 9,000 Btu/h · DuctlessKeeps 94% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    94% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    11.6 (HSPF2)
    Top 10%
    74.8score / 100
  2. 2D2018SHO2with ductless indoor unit DF2018HMSI2DIAMONDAIR1.5 tons · 18,000 Btu/h · DuctlessKeeps 96% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.89 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.6 (HSPF2)
    Great
    70.2score / 100
  3. 3D2012SHO2with ductless indoor unit DF2012HMSI2DIAMONDAIR1 ton · 12,000 Btu/h · DuctlessKeeps 92% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    92% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.89 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.5 (HSPF2)
    Great
    68.2score / 100

Nutech

  1. 1NU9WKU1with ductless indoor unit NU9WKU1Nutech1 ton · 9,000 Btu/h · DuctlessKeeps 70% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.16 (COP at 5°F)
    Great
    Seasonal efficiency
    9.1 (HSPF2)
    Below the middle
    56.7score / 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.

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