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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 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?

Daizuki

  1. 1DXLC-0923-1Zwith ducted air handler DXFU09E426-20Daizuki1 ton · 9,000 Btu/h · DuctedKeeps 80% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    80% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.09 (COP at 5°F)
    Good
    Seasonal efficiency
    10.2 (HSPF2)
    Great
    70.4score / 100
  2. 2DXLC-1223-1Zwith ducted air handler DXFU12E426-21Daizuki1 ton · 11,500 Btu/h · DuctedKeeps 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
    2.26 (COP at 5°F)
    Great
    Seasonal efficiency
    10.3 (HSPF2)
    Great
    67.8score / 100
  3. 3DXFM-1823-2ZDaizuki1.5 tons · 18,000 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
    1.86 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.8 (HSPF2)
    Good
    46.5score / 100

IAIR

None of IAIR’s ducted, up to 1.5 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