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.

Daizuki and Durastar 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, Durastar scores higher on 6 of the 6 ratings.

Daizuki
Durastar
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Daizuki	Durastar
Efficiency index	52%median —	59%median — · 8th ranked
COP at 5°F	39%median 1.80	54%median 2.00 · 14th ranked
Capacity retention at 5°F	43%median 70%	55%median 65% · 14th ranked
HSPF2	40%median 8.5	66%median 9.4 · 7th ranked
SEER2	52%median 19.0	62%median 19.0 · 7th ranked
EER2	43%median 10.0	57%median 11.7 · 10th ranked
Heating capacity at 5°F	42%median 11,600 Btu/h	53%median 20,400 Btu/h · 14th ranked
Outdoor models	34	35
AHRI certifications	54	293

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Daizuki	Durastar
CEE 2025 Tier 1 (Split ASHP)	58.8%20 models	57.1%20 models
CEE 2026 Tier 1 (Split ASHP)	55.9%19 models	51.4%18 models
CEE Advanced Tier (Split ASHP)	0%0 models	2.9%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	41.2%14 models	45.7%16 models
DOE Cold Climate Heat Pump Challenge	0%0 models	2.9%1 models
ENERGY STAR Cold Climate	0%0 models	60%21 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 · 8 groups where both have models

Daizuki
Durastar
All models of the group

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

Source: AHRI Directory · as of Oct 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	Daizuki	Durastar
Ducted, up to 1.5 tons	4 · index 68%	10 · index 59%
Ducted, 2 tons	1 · index 84%	3 · index 71%
Ducted, 2.5–3 tons	2 · index 66%	9 · index 53%
Ducted, 3.5–4.5 tons	1 · index 64%	10 · index 53%
Ducted, 5 tons and up	None	2 · index 55%
Non-ducted, up to 1.5 tons	21 · index 46%	8 · index 70%
Non-ducted, 2 tons	5 · index 42%	2 · index 67%
Non-ducted, 2.5–3 tons	7 · index 53%	5 · index 63%
Non-ducted, 3.5–4.5 tons	1 · index 59%	4 · index 51%

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 type	DaizukiCold-climate score, best model	DurastarCold-climate score, best model
Ducted, up to 1.5 tons	70.4(50 is the typical model of its size class)DXLC-0923-1Zwith ducted air handler DXFU09E426-203 of 4 models qualify · AHRI 216021067	74.9(50 is the typical model of its size class) (higher)DRA1H09S1Awith ducted air handler DRAD09F1A7 of 10 models qualify · AHRI 210568115
Ducted, 2 tons	80.3(50 is the typical model of its size class)DXLC-2423-1Zwith ducted air handler DXFU24E426-211 of 1 models qualify · AHRI 216021070	80.3(50 is the typical model of its size class)DRA1U24S1Bwith ducted air handler DRAD24F1A2 of 3 models qualify · AHRI 207787145
Ducted, 2.5–3 tons	None on this board (0 of 2 models qualify)	66.7(50 is the typical model of its size class)DRA3H28M1A3 of 9 models qualify · AHRI 210568215
Ducted, 3.5–4.5 tons	None on this board (0 of 1 models qualify)	74.9(50 is the typical model of its size class)DRA5H48M1A2 of 10 models qualify · AHRI 210568221
Ducted, 5 tons and up	No models in this size class	None on this board (0 of 2 models qualify)
Non-ducted, up to 1.5 tons	86.0(50 is the typical model of its size class)DXLC-0923-1Zwith ductless indoor unit DXMH09E426-2511 of 21 models qualify · AHRI 216021063	86.0(50 is the typical model of its size class)DRA1U09S1Bwith ductless indoor unit DRAW09F1B7 of 8 models qualify · AHRI 207787130
Non-ducted, 2 tons	74.1(50 is the typical model of its size class)DXLC-2423-1Zwith ductless indoor unit DXFC24E426-201 of 5 models qualify · AHRI 217196893	86.1(50 is the typical model of its size class) (higher)DRA1H24S1Awith ductless indoor unit DRAC24F1B2 of 2 models qualify · AHRI 210568114
Non-ducted, 2.5–3 tons	53.0(50 is the typical model of its size class)DXFM-2723-3Z1 of 7 models qualify · AHRI 211994914	73.4(50 is the typical model of its size class) (higher)DRA4H36M1A4 of 5 models qualify · AHRI 210568217
Non-ducted, 3.5–4.5 tons	26.3(50 is the typical model of its size class)DXFM-4823-5Z1 of 1 models qualify · AHRI 211994920	80.5(50 is the typical model of its size class) (higher)DRA5H48M1A2 of 4 models qualify · AHRI 210568220

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 type	DaizukiAll-around score, best model	DurastarAll-around score, best model
Ducted, up to 1.5 tons	78.5(50 is the typical model of its size class)DXLC-1823-1Zwith ducted air handler DXFU18E426-194 of 4 models have all five ratings · AHRI 216021069	85.2(50 is the typical model of its size class) (higher)DRA1H09S1Awith ducted air handler DRAD09F1A10 of 10 models have all five ratings · AHRI 210568115
Ducted, 2 tons	83.8(50 is the typical model of its size class)DXLC-2423-1Zwith ducted air handler DXFU24E426-211 of 1 models have all five ratings · AHRI 216021070	83.8(50 is the typical model of its size class)DRA1U24S1Bwith ducted air handler DRAD24F1A3 of 3 models have all five ratings · AHRI 207787145
Ducted, 2.5–3 tons	75.5(50 is the typical model of its size class) (higher)DXFM-2723-3Z2 of 2 models have all five ratings · AHRI 211994915	74.6(50 is the typical model of its size class)DRA3H28M1A9 of 9 models have all five ratings · AHRI 210568215
Ducted, 3.5–4.5 tons	63.5(50 is the typical model of its size class)DXFM-4823-5Z1 of 1 models have all five ratings · AHRI 211994921	82.0(50 is the typical model of its size class) (higher)DRA5H48M1A10 of 10 models have all five ratings · AHRI 210568221
Ducted, 5 tons and up	No models in this size class	68.1(50 is the typical model of its size class)DRHP15A60AJ2ANwith ducted air handler F,PE*DD19602 of 2 models have all five ratings · AHRI 214077297
Non-ducted, up to 1.5 tons	88.4(50 is the typical model of its size class) (higher)DXLC-0923-1Zwith ductless indoor unit DXMH09E426-2515 of 21 models have all five ratings · AHRI 216021063	86.7(50 is the typical model of its size class)DRA1U09S1Bwith ductless indoor unit DRAW09F1B8 of 8 models have all five ratings · AHRI 207787130
Non-ducted, 2 tons	77.5(50 is the typical model of its size class) (higher)DXLC-2423-1Zwith ductless indoor unit DXMH24E426-204 of 5 models have all five ratings · AHRI 216021066	72.0(50 is the typical model of its size class)DRA1U24S1Bwith ductless indoor unit DRAF24F1A2 of 2 models have all five ratings · AHRI 207787146
Non-ducted, 2.5–3 tons	73.9(50 is the typical model of its size class) (higher)DXFM-2723-3Z3 of 7 models have all five ratings · AHRI 211994914	70.8(50 is the typical model of its size class)DRA4H36M1A5 of 5 models have all five ratings · AHRI 210568217
Non-ducted, 3.5–4.5 tons	59.4(50 is the typical model of its size class)DXFM-4823-5Z1 of 1 models have all five ratings · AHRI 211994920	73.8(50 is the typical model of its size class) (higher)DRA5H48M1A4 of 4 models have all five ratings · AHRI 210568220

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
Rating	Daizuki	Durastar
COP at 5°F	beats 92% · 2.28DXLC-1223-1ZNon-ducted, up to 1.5 tons	beats 98% · 2.45DRA1U12S1BNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 71% · 86%DXLC-0923-1ZNon-ducted, up to 1.5 tons	beats 95% · 113%DRA1U09S1BNon-ducted, up to 1.5 tons
HSPF2	beats 98% · 11.2DXLC-2423-1ZDucted, 2 tons	beats 98% · 12.0DRA1H09S1ADucted, up to 1.5 tons
SEER2	beats 99% · 24.6DXFM-2723-3ZNon-ducted, 2.5–3 tons	beats 99% · 20.9DRA5H48M1ADucted, 3.5–4.5 tons
EER2	beats 97% · 14.0DXLC-2423-1ZNon-ducted, 2 tons	beats 95% · 15.8DRA1H09S1ANon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 85% · 14,000 Btu/hDXFM-1823-2ZNon-ducted, up to 1.5 tons	beats 96% · 20,000 Btu/hDRA2H18M1ANon-ducted, up to 1.5 tons

More comparisons

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Daizuki vs Durastar heat pumps