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DiamondAir vs TUTTOKOOL: 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

TUTTOKOOL

27%

of similar heat pumps beaten by its typical model

Well below average

22 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 ratedTUTTOKOOL: Beats 46%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDiamondAir: Not ratedTUTTOKOOL: Beats 14%
  • Winter-long heating efficiencyHSPF2DiamondAir: Beats 26%TUTTOKOOL: Beats 18%
  • Summer-long cooling efficiencySEER2DiamondAir: Beats 21%TUTTOKOOL: Beats 21%
  • Hot-day cooling efficiencyEER2DiamondAir: Beats 60%TUTTOKOOL: Beats 38%

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%
    TUTTOKOOL
    0%

  • Xcel CC

    DiamondAir
    0%
    TUTTOKOOL
    0%

  • CEE Advanced

    DiamondAir
    0%
    TUTTOKOOL
    0%

  • ENERGY STAR CC

    DiamondAir
    0%
    TUTTOKOOL
    0%

All-around best, ductless 2 tons

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

Showing Ductless, 2 tons (21,000–26,999 Btu/h cooling). What size is my system?

DiamondAir

No ductless, 2 tons model from DiamondAir.

TUTTOKOOL

No ductless, 2 tons model from TUTTOKOOL.

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