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DAIZUKI heat pump efficiency: 12 outdoor models compared

DAIZUKI has 12 heat pump outdoor models certified with this refrigerant group, in 12 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes DAIZUKI makes. DAIZUKI has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of updated · sources

Outdoor models
12
AHRI certifications
12
Efficiency index
47%
Typical model vs same-size, same-type peers (12 models)
Meet CEE 2025
91.7%
11 models

How DAIZUKI compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.
DAIZUKI against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of DAIZUKI’s own modelsDAIZUKI is strongest on SEER2 (its typical model beats 61% of comparable models) and weakest on COP at 5°F (39%).
  • DAIZUKI
  • Middle half of its models
  • Other ranked manufacturers
DAIZUKI

Source: AHRI Directory, NEEP · as of

Average peer percentile of DAIZUKI’s models
RatingBeats comparable modelsRankRaw median
Efficiency index12 models scored47%Not ranked—
COP at 5°F12 models scored39%Not ranked1.93
Capacity retention at 5°F12 models scored41%Not ranked71%
HSPF212 models scored47%Not ranked10.0
SEER212 models scored61%Not ranked22.3
EER212 models scored44%Not ranked11.7
Heating capacity at 5°F12 models scored45%Not ranked16,900 Btu/h

Standards met

Share of DAIZUKI’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)91.7%11
CEE 2026 Tier 1 (Split ASHP)91.7%11
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)75%9
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate0%0

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
DAIZUKI’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line
  • DAIZUKI (median, middle 50%, 10th–90th)
  • All models of the group
Non-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Non-ducted, up to 1.5 tons650%35%46%62%
Non-ducted, 2 tons249%52%47%60%
Non-ducted, 2.5–3 tons341%38%50%54%
Non-ducted, 3.5–4.5 tons143%37%40%73%

Every DAIZUKI model in the market

DAIZUKI’s 12 models with a known size and duct type, over the shape of the whole catalog.
DAIZUKI models by size and ratingColoured: DAIZUKI · grey shapes: all 14,508 models · lines: catalog medians by size
  • DAIZUKI models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 12 daizuki models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 models, half a ton at a time.
Show the data as a table
COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, sizeModels10th pct.25thMedian75th90th
Ducted, 0.5 tons8261.641.711.751.852.24
Ducted, 1 ton4071.801.902.052.412.45
Ducted, 1.5 tons9921.751.862.002.172.40
Ducted, 2 tons9991.751.862.002.182.30
Ducted, 2.5 tons1,0401.701.802.002.102.36
Ducted, 3 tons6961.801.902.002.102.42
Ducted, 3.5 tons8651.701.802.002.102.46
Ducted, 4 tons7261.801.862.002.122.41
Ducted, 4.5 tons6901.701.801.902.102.20
Ducted, 5 tons861.892.002.102.102.10
Non-ducted, 0.5 tons1,1861.751.801.902.002.22
Non-ducted, 1 ton1,3431.801.801.992.102.21
Non-ducted, 1.5 tons1,2611.801.802.002.102.31
Non-ducted, 2 tons7611.801.982.002.102.30
Non-ducted, 2.5 tons4031.801.852.002.002.10
Non-ducted, 3 tons4731.901.982.002.032.20
Non-ducted, 3.5 tons2802.002.002.002.052.10
Non-ducted, 4 tons2041.962.002.052.102.11
Non-ducted, 4.5 tons781.901.911.952.012.01
Non-ducted, 5 tons841.992.002.052.202.20

Source: AHRI Directory · as of

Top DAIZUKI models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 5 DAIZUKI cold-climate picks across sizes. Qualifies when its capacity retention at 5°F (capacity at 5°F as a share of capacity at 47°F) is at least 70% and Capacity retention at 5°F, COP at 5°F, HSPF2 are all rated. Score = the equal-weight mean of its peer percentiles on Capacity retention at 5°F, COP at 5°F, HSPF2 (share of the other models in its peer group it beats, 0–100), all from one certified pairing: in each duct type a model is sold in, its qualifying pairing of that type with the best score; equal scores (one decimal) go to the higher heating capacity at 5°F.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2Btu/h @5°FSEER2MeetsCombosAHRI ref.Compared withScore
1DXFMT-1824-2ZDAIZUKI1.5 tons18,000 Btu/h · Non-ducted80%2.0010.516,00024.0CEE 25CEE 26Xcel1217500268Non-ducted, up to 1.5 tons68.6
2DXTH12C526A-25DAIZUKIwith ductless indoor unit DXTH12E526A-251 ton12,000 Btu/h · Non-ducted100%1.8010.512,00025.0CEE 25CEE 26Xcel1217996672Non-ducted, up to 1.5 tons62.1
3DXTH24C526A-25DAIZUKIwith ductless indoor unit DXTH24E526A-252 tons24,000 Btu/h · Non-ducted93%1.8010.022,40022.5CEE 25CEE 26Xcel1217996674Non-ducted, 2 tons58.0
4DXFMT-2724-3ZDAIZUKI2.5 tons27,000 Btu/h · Non-ducted71%2.0010.519,80024.0CEE 25CEE 26Xcel1217500269Non-ducted, 2.5–3 tons57.5
5DXTH18C526A-25DAIZUKIwith ductless indoor unit DXTH18E526A-251.5 tons18,000 Btu/h · Non-ducted99%1.8010.017,80023.5CEE 25CEE 26Xcel1217996673Non-ducted, up to 1.5 tons55.9

All-around best

Top 5 DAIZUKI models on the all-around score across sizes. Score = 50% heating, the mean of its peer percentiles on COP at 5°F, Capacity retention at 5°F, HSPF2, plus 50% cooling, the mean of its peer percentiles on SEER2 and EER2 (share of the other models in its peer group it beats, 0–100). All five ratings are required; there is no minimum heat kept at 5°F. In each duct type a model is sold in, it is scored on its pairing of that type with the best score; equal scores (one decimal) go to the higher cold-climate score, then the higher heating capacity at 5°F.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2SEER2EER2MeetsCombosAHRI ref.Compared withScoreHeating halfCooling halfCold-climate score
1DXTH12C526A-25DAIZUKIwith ductless indoor unit DXTH12E526A-251 ton12,000 Btu/h · Non-ducted100%1.8010.525.014.0CEE 25CEE 26Xcel1217996672Non-ducted, up to 1.5 tons74.462.186.762.1
2DXFMT-1824-2ZDAIZUKI1.5 tons18,000 Btu/h · Non-ducted80%2.0010.524.013.0CEE 25CEE 26Xcel1217500268Non-ducted, up to 1.5 tons72.268.675.868.6
3DXFMT-2724-3ZDAIZUKI2.5 tons27,000 Btu/h · Non-ducted71%2.0010.524.012.0CEE 25CEE 26Xcel1217500269Non-ducted, 2.5–3 tons65.157.572.657.5
4DXTH18C526A-25DAIZUKIwith ductless indoor unit DXTH18E526A-251.5 tons18,000 Btu/h · Non-ducted99%1.8010.023.512.5CEE 25CEE 26Xcel1217996673Non-ducted, up to 1.5 tons61.255.966.555.9
5DXTH24C526A-25DAIZUKIwith ductless indoor unit DXTH24E526A-252 tons24,000 Btu/h · Non-ducted93%1.8010.022.511.7CEE 25CEE 26Xcel1217996674Non-ducted, 2 tons56.158.054.258.0

Best model on each rating

DAIZUKI’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FDXTH24C626A-212.25Non-ducted, 2 tons88%217604098
Capacity retention at 5°FDXTH12C526A-25100%Non-ducted, up to 1.5 tons87%217996672
HSPF2DXFMT-2724-3Z10.5Non-ducted, 2.5–3 tons80%217500269
SEER2DXFMT-2724-3Z24.0Non-ducted, 2.5–3 tons91%217500269
EER2DXTH12C526A-2514.0Non-ducted, up to 1.5 tons83%217996672
Heating capacity at 5°FDXTH18C526A-2517,800 Btu/hNon-ducted, up to 1.5 tons90%217996673

All 12 DAIZUKI models in Explore

DAIZUKI size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.
DAIZUKI: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct typeCold-climate pickCold-climate score, best modelAll-around bestAll-around score, best model
Non-ducted, up to 1.5 tons68.6(50 is the typical model of its size class)DXFMT-1824-2Z5 of 6 models qualify · AHRI 21750026874.4(50 is the typical model of its size class)DXTH12C526A-25with ductless indoor unit DXTH12E526A-256 of 6 models have all five ratings · AHRI 217996672
Non-ducted, 2 tons58.0(50 is the typical model of its size class)DXTH24C526A-25with ductless indoor unit DXTH24E526A-251 of 2 models qualify · AHRI 21799667456.1(50 is the typical model of its size class)DXTH24C526A-25with ductless indoor unit DXTH24E526A-252 of 2 models have all five ratings · AHRI 217996674
Non-ducted, 2.5–3 tons57.5(50 is the typical model of its size class)DXFMT-2724-3Z2 of 3 models qualify · AHRI 21750026965.1(50 is the typical model of its size class)DXFMT-2724-3Z3 of 3 models have all five ratings · AHRI 217500269
Non-ducted, 3.5–4.5 tons32.0(50 is the typical model of its size class)DXFMT-4224-5Z1 of 1 models qualify · AHRI 21750027142.9(50 is the typical model of its size class)DXFMT-4224-5Z1 of 1 models have all five ratings · AHRI 217500271

All-around board, every manufacturer

Newest DAIZUKI certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified DAIZUKI outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
DXTH36C626A-17DAIZUKIwith ductless indoor unit DXTH36E626A-173 tons35,000 Btu/h · Non-ducted1.8051%8.517.0None1218467217
DXTH24C526A-25DAIZUKIwith ductless indoor unit DXTH24E526A-252 tons24,000 Btu/h · Non-ducted1.8093%10.022.5CEE 25CEE 26Xcel1217996674
DXTH18C526A-25DAIZUKIwith ductless indoor unit DXTH18E526A-251.5 tons18,000 Btu/h · Non-ducted1.8099%10.023.5CEE 25CEE 26Xcel1217996673
DXTH12C526A-25DAIZUKIwith ductless indoor unit DXTH12E526A-251 ton12,000 Btu/h · Non-ducted1.80100%10.525.0CEE 25CEE 26Xcel1217996672
DXTH24C626A-21DAIZUKIwith ductless indoor unit DXTH24E626A-212 tons23,000 Btu/h · Non-ducted2.2555%9.021.0CEE 25CEE 261217604098

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DAIZUKI includes these brand names as listed in AHRI: DAIZUKI. Standards are checked against published thresholds; program rules beyond ratings are not checked.