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Daizuki vs IAIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical Daizuki model beats 52% and a typical IAIR model 18%. Daizuki rates higher overall.

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

Daizuki

52%

of similar heat pumps beaten by its typical model

About average

34 models listed

IAIR

18%

of similar heat pumps beaten by its typical model

Well below average

35 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°FDaizuki: Beats 39%IAIR: Beats 2%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDaizuki: Beats 43%IAIR: Beats 4%
  • Winter-long heating efficiencyHSPF2Daizuki: Beats 40%IAIR: Beats 19%
  • Summer-long cooling efficiencySEER2Daizuki: Beats 52%IAIR: Beats 15%
  • Hot-day cooling efficiencyEER2Daizuki: Beats 43%IAIR: Beats 60%

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

    Daizuki
    59%
    IAIR
    0%

  • Xcel CC

    Daizuki
    41%
    IAIR
    0%

  • CEE Advanced

    Daizuki
    0%
    IAIR
    0%

  • ENERGY STAR CC

    Daizuki
    0%
    IAIR
    0%

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

Daizuki

None of Daizuki’s ducted, 2.5–3 tons models qualifies.

IAIR

None of IAIR’s ducted, 2.5–3 tons models qualifies.

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