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.

Airdach and Nutech 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, Nutech scores higher on 5 of the 6 ratings.

Airdach
Nutech
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Airdach	Nutech
Efficiency index	40%median —	54%median —
COP at 5°F	48%median 1.94	58%median 2.00
Capacity retention at 5°F	34%median 71%	42%median 70%
HSPF2	28%median 7.5	60%median 9.2
SEER2	29%median 14.3	64%median 19.3
EER2	49% (higher)median 11.4	43% (higher)median 11.0
Heating capacity at 5°F	31%median 15,700 Btu/h	52%median 19,550 Btu/h
Outdoor models	29	28
AHRI certifications	45	40

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Airdach	Nutech
CEE 2025 Tier 1 (Split ASHP)	24.1%7 models	85.7%24 models
CEE 2026 Tier 1 (Split ASHP)	24.1%7 models	78.6%22 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	31%9 models	60.7%17 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	0%0 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 · 7 groups where both have models

Airdach
Nutech
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	Airdach	Nutech
Ducted, up to 1.5 tons	2 · index —	5 · index 70%
Ducted, 2 tons	3 · index 36%	3 · index 65%
Ducted, 2.5–3 tons	7 · index 48%	4 · index 54%
Ducted, 3.5–4.5 tons	10 · index 54%	6 · index 57%
Ducted, 5 tons and up	None	2 · index 64%
Non-ducted, up to 1.5 tons	5 · index 30%	6 · index 41%
Non-ducted, 2 tons	1 · index 25%	2 · index 43%
Non-ducted, 2.5–3 tons	1 · index 30%	3 · index 42%
Non-ducted, 3.5–4.5 tons	None	1 · index 51%
Non-ducted, 5 tons and up	None	1 · index 27%

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	AirdachCold-climate score, best model	NutechCold-climate score, best model
Ducted, up to 1.5 tons	None on this board (0 of 2 models qualify)	81.3(50 is the typical model of its size class)NOX230-09HFN10-M1with ducted air handler NTJ-09HWFN10-M1-D4 of 5 models qualify · AHRI 216578942
Ducted, 2 tons	None on this board (0 of 3 models qualify)	77.1(50 is the typical model of its size class)NOD30-24HFN10-M1with ducted air handler NTJ-24HWFN10-M1-D3 of 3 models qualify · AHRI 215894267
Ducted, 2.5–3 tons	59.2(50 is the typical model of its size class)A3TH36180OV1DGwith ducted air handler A3DH36000OE1DT1 of 7 models qualify · AHRI 218797045	60.6(50 is the typical model of its size class) (higher)N5OD30-36HFN10-M1D-D2 of 4 models qualify · AHRI 215894278
Ducted, 3.5–4.5 tons	69.8(50 is the typical model of its size class)A3TH60180OV1DGwith ducted air handler A3DH60000OE1DT1 of 10 models qualify · AHRI 218797046	77.9(50 is the typical model of its size class) (higher)N6OE30-48HFN10-M1D-D6 of 6 models qualify · AHRI 215894281
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	41.6(50 is the typical model of its size class)ACSH0920VR1-D3with ductless indoor unit AIWH0900VR1-D35 of 5 models qualify · AHRI 217101992	65.6(50 is the typical model of its size class) (higher)N3OX430-18HFN10-M1-D3 of 6 models qualify · AHRI 215894273
Non-ducted, 2 tons	13.5(50 is the typical model of its size class)ACSH2419VR1-D3with ductless indoor unit AIWH2400VR1-D31 of 1 models qualify · AHRI 217101991	45.1(50 is the typical model of its size class) (higher)NOX430-24HFN10-230with ductless indoor unit NSAG11D-24HRFN10-2302 of 2 models qualify · AHRI 215894262
Non-ducted, 2.5–3 tons	22.3(50 is the typical model of its size class)ACSH3621VR1-D3with ductless indoor unit AIWH3600VR1-D31 of 1 models qualify · AHRI 217101990	47.2(50 is the typical model of its size class) (higher)N5OD30-36HFN10-M1D-D1 of 3 models qualify · AHRI 215894277
Non-ducted, 3.5–4.5 tons	No models in this size class	60.1(50 is the typical model of its size class)N6OE30-48HFN10-M1D-D1 of 1 models qualify · AHRI 215894282
Non-ducted, 5 tons and up	No models in this size class	None on this board (0 of 1 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	AirdachAll-around score, best model	NutechAll-around score, best model
Ducted, up to 1.5 tons	None on this board (0 of 2 models have all five ratings)	80.8(50 is the typical model of its size class)NOX230-09HFN10-M1with ducted air handler NTJ-09HWFN10-M1-D5 of 5 models have all five ratings · AHRI 216578942
Ducted, 2 tons	35.7(50 is the typical model of its size class)A4TH24152MN1DLwith ducted air handler A4DH2400ME1DT1 of 3 models have all five ratings · AHRI 218331772	78.8(50 is the typical model of its size class) (higher)NOD30-24HFN10-M1with ducted air handler NTJ-24HWFN10-M1-D3 of 3 models have all five ratings · AHRI 215894267
Ducted, 2.5–3 tons	57.4(50 is the typical model of its size class)A3TH36180OV1DGwith ducted air handler A3DH36000OE1DT3 of 7 models have all five ratings · AHRI 218797045	69.5(50 is the typical model of its size class) (higher)N5OD30-36HFN10-M1D-D4 of 4 models have all five ratings · AHRI 215894278
Ducted, 3.5–4.5 tons	59.5(50 is the typical model of its size class)A3TH60180OV1DGwith ducted air handler A3DH60000OE1DT4 of 10 models have all five ratings · AHRI 218797046	85.1(50 is the typical model of its size class) (higher)N6OE30-48HFN10-M1D-D6 of 6 models have all five ratings · AHRI 215894281
Ducted, 5 tons and up	No models in this size class	65.3(50 is the typical model of its size class)NOE30-60HFN10-M2with ducted air handler NHJ-60HWFN10-M2-D2 of 2 models have all five ratings · AHRI 215894270
Non-ducted, up to 1.5 tons	44.9(50 is the typical model of its size class)ACSH0920VR1-D3with ductless indoor unit AIWH0900VR1-D35 of 5 models have all five ratings · AHRI 217101992	62.1(50 is the typical model of its size class) (higher)N3OX430-18HFN10-M1-D6 of 6 models have all five ratings · AHRI 215894271
Non-ducted, 2 tons	24.5(50 is the typical model of its size class)ACSH2419VR1-D3with ductless indoor unit AIWH2400VR1-D31 of 1 models have all five ratings · AHRI 217101991	56.7(50 is the typical model of its size class) (higher)N4OD30-27HFN10-M1D-D2 of 2 models have all five ratings · AHRI 215894274
Non-ducted, 2.5–3 tons	30.4(50 is the typical model of its size class)ACSH3621VR1-D3with ductless indoor unit AIWH3600VR1-D31 of 1 models have all five ratings · AHRI 217101990	58.3(50 is the typical model of its size class) (higher)N5OD30-36HFN10-M1D-D3 of 3 models have all five ratings · AHRI 215894277
Non-ducted, 3.5–4.5 tons	No models in this size class	52.8(50 is the typical model of its size class)N6OE30-48HFN10-M1D-D1 of 1 models have all five ratings · AHRI 215894282
Non-ducted, 5 tons and up	No models in this size class	32.5(50 is the typical model of its size class)N6OE30-60HFN10-M1D-D1 of 1 models have all five ratings · AHRI 215894283

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	Airdach	Nutech
COP at 5°F	beats 86% · 2.30A4TH42152MN1DLDucted, 3.5–4.5 tons	beats 95% · 2.44NOX230-12HFN10-M1Ducted, up to 1.5 tons
Capacity retention at 5°F	beats 55% · 73%A3TH36180OV1DGDucted, 2.5–3 tons	beats 84% · 93%NWDB-48HI1N4S4-M-SE18Ducted, 3.5–4.5 tons
HSPF2	beats 64% · 8.8A3TH60180OV1DGDucted, 3.5–4.5 tons	beats 95% · 11.5NOX230-09HFN10-M1Ducted, up to 1.5 tons
SEER2	beats 76% · 18.0A3TH60180OV1DGDucted, 3.5–4.5 tons	beats 96% · 20.4N6OE30-48HFN10-M1D-DDucted, 3.5–4.5 tons
EER2	beats 83% · 12.0A4TH48152MN1DLDucted, 3.5–4.5 tons	beats 91% · 13.3NOX430-18HFN10-M1Ducted, up to 1.5 tons
Heating capacity at 5°F	beats 69% · 12,100 Btu/hACSH1820VR1-D3Non-ducted, up to 1.5 tons	beats 83% · 14,000 Btu/hN3OX430-18HFN10-M1-DNon-ducted, up to 1.5 tons

More comparisons

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Airdach vs Nutech heat pumps