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.

Della and DUOHOME 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, DUOHOME scores higher on 6 of the 6 ratings.

Della
DUOHOME
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Della	DUOHOME
Efficiency index	39%median — · 27th ranked	52%median —
COP at 5°F	42%median 1.80 · 25th ranked	51%median 1.99
Capacity retention at 5°F	37%median 70% · 26th ranked	38%median 66%
HSPF2	23%median 8.5 · 27th ranked	61%median 9.3
SEER2	35%median 19.0 · 27th ranked	57%median 20.0
EER2	28%median 10.0 · 27th ranked	44%median 10.7
Heating capacity at 5°F	37%median 11,600 Btu/h · 26th ranked	43%median 14,800 Btu/h
Outdoor models	22	22
AHRI certifications	22	37

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Della	DUOHOME
CEE 2025 Tier 1 (Split ASHP)	54.5%12 models	59.1%13 models
CEE 2026 Tier 1 (Split ASHP)	45.5%10 models	50%11 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	36.4%8 models	27.3%6 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	18.2%4 models	0%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 · 3 groups where both have models

Della
DUOHOME
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 9, 2026

Models per peer group · efficiency index within the group
Size and duct type	Della	DUOHOME
Ducted, up to 1.5 tons	None	2 · index 69%
Ducted, 2 tons	None	1 · index 84%
Ducted, 2.5–3 tons	None	4 · index 55%
Ducted, 3.5–4.5 tons	None	4 · index 53%
Ducted, 5 tons and up	None	1 · index 55%
Non-ducted, up to 1.5 tons	16 · index 43%	9 · index 49%
Non-ducted, 2 tons	3 · index 39%	2 · index 47%
Non-ducted, 2.5–3 tons	3 · index 27%	5 · index 49%
Non-ducted, 3.5–4.5 tons	None	3 · 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 type	DellaCold-climate score, best model	DUOHOMECold-climate score, best model
Ducted, up to 1.5 tons	No models in this size class	52.0(50 is the typical model of its size class)D2OA-18HFN1-M1 of 2 models qualify · AHRI 211911389
Ducted, 2 tons	No models in this size class	80.3(50 is the typical model of its size class)DOD33-24HFN1-MT0Wwith ducted air handler DTIU-24HWFN1-M1 of 1 models qualify · AHRI 214797741
Ducted, 2.5–3 tons	No models in this size class	57.8(50 is the typical model of its size class)D3OJ-27HFN1-M1 of 4 models qualify · AHRI 211911392
Ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 4 models qualify)
Ducted, 5 tons and up	No models in this size class	None on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons	68.8(50 is the typical model of its size class) (higher)048-TP-12K2V-23S-OUTwith ductless indoor unit 048-TP-12K2V-23S-IN8 of 16 models qualify · AHRI 213927343	63.3(50 is the typical model of its size class)DOX230-09HFN1-MW5Wwith ductless indoor unit DCA3U-09HRFN1-M(C)3 of 9 models qualify · AHRI 214875723
Non-ducted, 2 tons	None on this board (0 of 3 models qualify)	59.4(50 is the typical model of its size class)DOD33-24HFN1-MT0Wwith ductless indoor unit DCD1-24HRFN1-MT0W(GA)1 of 2 models qualify · AHRI 214875724
Non-ducted, 2.5–3 tons	None on this board (0 of 3 models qualify)	50.1(50 is the typical model of its size class)D3OJ-27HFN1-M1 of 5 models qualify · AHRI 211911391
Non-ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 3 models qualify)

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	DellaAll-around score, best model	DUOHOMEAll-around score, best model
Ducted, up to 1.5 tons	No models in this size class	78.5(50 is the typical model of its size class)DOX430-18HFN1-MU0Wwith ducted air handler DTIU-18HWFN1-M2 of 2 models have all five ratings · AHRI 214797740
Ducted, 2 tons	No models in this size class	83.8(50 is the typical model of its size class)DOD33-24HFN1-MT0Wwith ducted air handler DTIU-24HWFN1-M1 of 1 models have all five ratings · AHRI 214797741
Ducted, 2.5–3 tons	No models in this size class	71.7(50 is the typical model of its size class)D3OJ-27HFN1-M3 of 4 models have all five ratings · AHRI 211911392
Ducted, 3.5–4.5 tons	No models in this size class	63.5(50 is the typical model of its size class)D5OG-48HFN1-M3 of 4 models have all five ratings · AHRI 211911398
Ducted, 5 tons and up	No models in this size class	54.5(50 is the typical model of its size class)DOE30U-60HFN1-Mwith ducted air handler DHG-60HWFN1-MW1 of 1 models have all five ratings · AHRI 206314613
Non-ducted, up to 1.5 tons	70.8(50 is the typical model of its size class)048-TP-12K2V-23S-OUTwith ductless indoor unit 048-TP-12K2V-23S-IN10 of 16 models have all five ratings · AHRI 213927343	71.6(50 is the typical model of its size class) (higher)DOX230-12HFN1-MV5Wwith ductless indoor unit DCA3U-12HRFN1-M(C)9 of 9 models have all five ratings · AHRI 214875728
Non-ducted, 2 tons	53.0(50 is the typical model of its size class)048-TP-24K2V-20S-OUTwith ductless indoor unit 048-TP-24K2V-20S-IN2 of 3 models have all five ratings · AHRI 213927345	66.3(50 is the typical model of its size class) (higher)DOD33-24HFN1-MT0Wwith ductless indoor unit DCD1-24HRFN1-MT0W(GA)2 of 2 models have all five ratings · AHRI 214875724
Non-ducted, 2.5–3 tons	29.5(50 is the typical model of its size class)048-TL-36K-MODU3 of 3 models have all five ratings · AHRI 211042067	67.1(50 is the typical model of its size class) (higher)D3OJ-27HFN1-M4 of 5 models have all five ratings · AHRI 211911391
Non-ducted, 3.5–4.5 tons	No models in this size class	48.3(50 is the typical model of its size class)D5OG-48HFN1-M3 of 3 models have all five ratings · AHRI 211911397

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	Della	DUOHOME
COP at 5°F	beats 89% · 2.21048-TP-18K2V-22S-OUTNon-ducted, up to 1.5 tons	beats 92% · 2.28DOX230-12HFN1-MV5WNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 64% · 77%048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tons	beats 73% · 59%DOE30U-60HFN1-MDucted, 5 tons and up
HSPF2	beats 57% · 9.5048-TP-12K2V-23S-OUTNon-ducted, up to 1.5 tons	beats 98% · 11.2DOD33-24HFN1-MT0WDucted, 2 tons
SEER2	beats 79% · 23.5048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tons	beats 98% · 21.0D3OJ-27HFN1-MDucted, 2.5–3 tons
EER2	beats 68% · 13.0048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tons	beats 85% · 12.5DOD33-24HFN1-MT0WDucted, 2 tons
Heating capacity at 5°F	beats 78% · 13,000 Btu/h048-TL-18K-MODUNon-ducted, up to 1.5 tons	beats 78% · 35,600 Btu/hDOE30U-60HFN1-MDucted, 5 tons and up

More comparisons

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Della vs DUOHOME heat pumps