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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%

All-around best, ductless 3.5–4.5 tons

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

Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

DiamondAir

No ductless, 3.5–4.5 tons model from DiamondAir.

Nutech

  1. 1N6OE30-48HFN10-M1D-DNutech4 tons · 45,000 Btu/h · DuctlessCold-climate pick, score 60.1Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Winter efficiency
    10.3 (HSPF2)
    Good
    Cooling efficiency
    20.9 (SEER2)
    Below the middle
    Hot-day cooling
    11.9 (EER2)
    Good
    52.8score / 100Heating 60 · Cooling 46

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