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CLASSIC vs DAIZUKI heat pumps

Measured against models of the same size and duct type, DAIZUKI scores higher on 4 of the 6 ratings. CLASSIC has 40 outdoor models, DAIZUKI has 12 outdoor models. CLASSIC and DAIZUKI have no QMID on file and are not ranked.

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CompareData as of updated · sources

Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.
CLASSIC and DAIZUKI on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, DAIZUKI scores higher on 4 of the 6 ratings.
  • CLASSIC
  • DAIZUKI
  • Other ranked manufacturers
CLASSICDAIZUKI

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCLASSICDAIZUKI
Efficiency index41%median —47%median —
COP at 5°F37%median 1.9039%median 1.93
Capacity retention at 5°F43% (higher)median 74%41% (higher)median 71%
HSPF237%median 8.847%median 10.0
SEER245%median 19.061%median 22.3
EER240%median 11.244%median 11.7
Heating capacity at 5°F47% (higher)median 11,750 Btu/h45% (higher)median 16,900 Btu/h
Outdoor models4012
AHRI certifications6812

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCLASSICDAIZUKI
CEE 2025 Tier 1 (Split ASHP)65%26 models91.7%11 models
CEE 2026 Tier 1 (Split ASHP)65%26 models91.7%11 models
CEE Advanced Tier (Split ASHP)2.5%1 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)65%26 models75%9 models
DOE Cold Climate Heat Pump Challenge2.5%1 models0%0 models
ENERGY STAR Cold Climate20%8 models0%0 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.
Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 4 groups where both have models
  • CLASSIC
  • DAIZUKI
  • All models of the group
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsNon-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

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeCLASSICDAIZUKI
Ducted, up to 1.5 tons2 · index 54%None
Ducted, 2 tons4 · index 61%None
Ducted, 2.5–3 tons2 · index 56%None
Ducted, 3.5–4.5 tons4 · index 70%None
Non-ducted, up to 1.5 tons23 · index 29%6 · index 50%
Non-ducted, 2 tons6 · index 35%2 · index 49%
Non-ducted, 2.5–3 tons5 · index 41%3 · index 41%
Non-ducted, 3.5–4.5 tons2 · index 59%1 · index 43%

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). 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.
Size and duct typeCLASSICCold-climate score, best modelDAIZUKICold-climate score, best model
Ducted, up to 1.5 tons44.0(50 is the typical model of its size class)TMRHC18AS22 of 2 models qualify · AHRI 218787831No models in this size class
Ducted, 2 tons60.4(50 is the typical model of its size class)OCV18HN024Awith ducted air handler OCA18C002AAlso listed as OCV18HN036A4 of 4 models qualify · AHRI 217747068No models in this size class
Ducted, 2.5–3 tons52.2(50 is the typical model of its size class)GMRSHC36AS42 of 2 models qualify · AHRI 217284819No models in this size class
Ducted, 3.5–4.5 tons72.2(50 is the typical model of its size class)OCV18HN048Awith ducted air handler OCA18C006AAlso listed as OCV18HN060A4 of 4 models qualify · AHRI 217747074No models in this size class
Non-ducted, up to 1.5 tons61.9(50 is the typical model of its size class)TMRHC18AS216 of 23 models qualify · AHRI 21878782768.6(50 is the typical model of its size class) (higher)DXFMT-1824-2Z5 of 6 models qualify · AHRI 217500268
Non-ducted, 2 tons67.5(50 is the typical model of its size class) (higher)GMRSHC24AS34 of 6 models qualify · AHRI 21728480458.0(50 is the typical model of its size class)DXTH24C526A-25with ductless indoor unit DXTH24E526A-251 of 2 models qualify · AHRI 217996674
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class) (higher)GMRSHC36AS44 of 5 models qualify · AHRI 21728481557.5(50 is the typical model of its size class)DXFMT-2724-3Z2 of 3 models qualify · AHRI 217500269
Non-ducted, 3.5–4.5 tons66.5(50 is the typical model of its size class) (higher)GMRSHC42AS52 of 2 models qualify · AHRI 21728481632.0(50 is the typical model of its size class)DXFMT-4224-5Z1 of 1 models qualify · AHRI 217500271

All-around best

Best all-around model per size and duct type. 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.
Size and duct typeCLASSICAll-around score, best modelDAIZUKIAll-around score, best model
Ducted, up to 1.5 tons60.2(50 is the typical model of its size class)TMRHC18AS22 of 2 models have all five ratings · AHRI 218787831No models in this size class
Ducted, 2 tons68.1(50 is the typical model of its size class)OCV18HN024Awith ducted air handler OCA18C002AAlso listed as OCV18HN036A4 of 4 models have all five ratings · AHRI 217747068No models in this size class
Ducted, 2.5–3 tons59.0(50 is the typical model of its size class)GMRSHC36AS42 of 2 models have all five ratings · AHRI 217284819No models in this size class
Ducted, 3.5–4.5 tons72.6(50 is the typical model of its size class)OCV18HN048Awith ducted air handler OCA18C006AAlso listed as OCV18HN060A4 of 4 models have all five ratings · AHRI 217747074No models in this size class
Non-ducted, up to 1.5 tons62.1(50 is the typical model of its size class)TMRHC18AS223 of 23 models have all five ratings · AHRI 21878782774.4(50 is the typical model of its size class) (higher)DXTH12C526A-25with ductless indoor unit DXTH12E526A-256 of 6 models have all five ratings · AHRI 217996672
Non-ducted, 2 tons67.6(50 is the typical model of its size class) (higher)GMRSHC24AS36 of 6 models have all five ratings · AHRI 21728480456.1(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 tons64.5(50 is the typical model of its size class)GMRSHC36AS45 of 5 models have all five ratings · AHRI 21728481565.1(50 is the typical model of its size class) (higher)DXFMT-2724-3Z3 of 3 models have all five ratings · AHRI 217500269
Non-ducted, 3.5–4.5 tons67.7(50 is the typical model of its size class) (higher)GMRSHC42AS52 of 2 models have all five ratings · AHRI 21728481642.9(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

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.
Top model per rating by peer percentile, with its AHRI-certified value and peer group
RatingCLASSICDAIZUKI
COP at 5°Fbeats 88% · 2.10GMRSHC36AS4Non-ducted, 2.5–3 tonsbeats 88% · 2.25DXTH24C626A-21Non-ducted, 2 tons
Capacity retention at 5°Fbeats 81% · 100%GMRSHC36AS4Non-ducted, 2.5–3 tonsbeats 87% · 100%DXTH12C526A-25Non-ducted, up to 1.5 tons
HSPF2beats 86% · 10.0TMRHC42AS5Ducted, 3.5–4.5 tonsbeats 80% · 10.5DXFMT-2724-3ZNon-ducted, 2.5–3 tons
SEER2beats 97% · 22.0TMRHC18AS2Ducted, up to 1.5 tonsbeats 91% · 24.0DXFMT-2724-3ZNon-ducted, 2.5–3 tons
EER2beats 94% · 13.0GMRSHC42AS5Non-ducted, 3.5–4.5 tonsbeats 83% · 14.0DXTH12C526A-25Non-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 86% · 36,000 Btu/hGMRSHC36AS4Non-ducted, 2.5–3 tonsbeats 90% · 17,800 Btu/hDXTH18C526A-25Non-ducted, up to 1.5 tons

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