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.

Custom Comfort 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, Custom Comfort scores higher on 5 of the 6 ratings.

Custom Comfort
Nutech
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Custom Comfort	Nutech
Efficiency index	65% (higher)median —	51% (higher)median —
COP at 5°F	50% (higher)median 1.98	37% (higher)median 1.90
Capacity retention at 5°F	83% (higher)median 89%	42% (higher)median 65%
HSPF2	84% (higher)median 9.9	63% (higher)median 9.3
SEER2	65%median 18.6	68%median 19.5
EER2	51% (higher)median 11.7	42% (higher)median 10.6
Heating capacity at 5°F	80% (higher)median 29,900 Btu/h	45% (higher)median 21,400 Btu/h
Outdoor models	20	25
AHRI certifications	69	51

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Custom Comfort	Nutech
CEE 2025 Tier 1 (Split ASHP)	75%15 models	64%16 models
CEE 2026 Tier 1 (Split ASHP)	75%15 models	48%12 models
CEE Advanced Tier (Split ASHP)	5%1 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	85%17 models	32%8 models
DOE Cold Climate Heat Pump Challenge	5%1 models	0%0 models
ENERGY STAR Cold Climate	100%20 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 · 8 groups where both have models

Custom Comfort
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 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	Custom Comfort	Nutech
Ducted, up to 1.5 tons	5 · index 63%	4 · index 52%
Ducted, 2 tons	2 · index 67%	2 · index 69%
Ducted, 2.5–3 tons	5 · index 63%	7 · index 54%
Ducted, 3.5–4.5 tons	6 · index 60%	6 · index 55%
Ducted, 5 tons and up	None	1 · index 42%
Non-ducted, up to 1.5 tons	5 · index 75%	4 · index 42%
Non-ducted, 2 tons	1 · index 84%	1 · index 27%
Non-ducted, 2.5–3 tons	4 · index 69%	5 · index 55%
Non-ducted, 3.5–4.5 tons	4 · index 54%	4 · index 44%

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	Custom ComfortCold-climate score, best model	NutechCold-climate score, best model
Ducted, up to 1.5 tons	74.9(50 is the typical model of its size class) (higher)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models qualify · AHRI 212365415	65.4(50 is the typical model of its size class)NOX330-12HFN1-MW5Wwith ducted air handler NTIU-12HWFN1-M3 of 4 models qualify · AHRI 212941749
Ducted, 2 tons	79.4(50 is the typical model of its size class)CCOXHASZ24HPwith ducted air handler CCOXHASD242 of 2 models qualify · AHRI 212365418	79.4(50 is the typical model of its size class)NOD30-24HFN1-MU0Wwith ducted air handler NTIU-24HWFN1-M2 of 2 models qualify · AHRI 212941751
Ducted, 2.5–3 tons	80.4(50 is the typical model of its size class) (higher)CCOXHAMZ327HP5 of 5 models qualify · AHRI 212631691	57.4(50 is the typical model of its size class)N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-M2 of 7 models qualify · AHRI 212941759
Ducted, 3.5–4.5 tons	86.4(50 is the typical model of its size class)CCOXHASZ48CHPwith ducted air handler CCOXHASD486 of 6 models qualify · AHRI 212365420	None on this board (0 of 6 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	89.3(50 is the typical model of its size class) (higher)CCOXHASZ06HPwith ductless indoor unit CCOXHAWM065 of 5 models qualify · AHRI 212365403	56.7(50 is the typical model of its size class)NU9WKU1with ductless indoor unit NU9WKU11 of 4 models qualify · AHRI 212941744
Non-ducted, 2 tons	86.1(50 is the typical model of its size class)CCOXHASZ24HPwith ductless indoor unit CCOXHA4C241 of 1 models qualify · AHRI 212365412	None on this board (0 of 1 models qualify)
Non-ducted, 2.5–3 tons	83.1(50 is the typical model of its size class) (higher)CCOXHAMZ327HP4 of 4 models qualify · AHRI 212631690	49.3(50 is the typical model of its size class)N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-M2 of 5 models qualify · AHRI 212941758
Non-ducted, 3.5–4.5 tons	76.8(50 is the typical model of its size class)CCOXHASZ60CHPwith ductless indoor unit CCOXHAFC604 of 4 models qualify · AHRI 212365428	None on this board (0 of 4 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	Custom ComfortAll-around score, best model	NutechAll-around score, best model
Ducted, up to 1.5 tons	85.2(50 is the typical model of its size class) (higher)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models have all five ratings · AHRI 212365415	64.5(50 is the typical model of its size class)NOX330-12HFN1-MW5Wwith ducted air handler NTIU-12HWFN1-M4 of 4 models have all five ratings · AHRI 212941749
Ducted, 2 tons	80.1(50 is the typical model of its size class)CCOXHASZ24HPwith ducted air handler CCOXHASD242 of 2 models have all five ratings · AHRI 212365418	80.1(50 is the typical model of its size class)NOD30-24HFN1-MU0Wwith ducted air handler NTIU-24HWFN1-M2 of 2 models have all five ratings · AHRI 212941751
Ducted, 2.5–3 tons	81.9(50 is the typical model of its size class) (higher)CCOXHAMZ327HP5 of 5 models have all five ratings · AHRI 212631691	71.5(50 is the typical model of its size class)N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-M7 of 7 models have all five ratings · AHRI 212941759
Ducted, 3.5–4.5 tons	82.0(50 is the typical model of its size class) (higher)CCOXHAMZ548HP6 of 6 models have all five ratings · AHRI 212365440	63.5(50 is the typical model of its size class)N5OG-48HFN1-MAlso listed as N2OA-48HFN1-M6 of 6 models have all five ratings · AHRI 212941765
Ducted, 5 tons and up	No models in this size class	41.7(50 is the typical model of its size class)NOE30U-60HFN1-MR0with ducted air handler NVC-60HWFN11 of 1 models have all five ratings · AHRI 212941774
Non-ducted, up to 1.5 tons	92.0(50 is the typical model of its size class) (higher)CCOXHASZ06HPwith ductless indoor unit CCOXHAWM065 of 5 models have all five ratings · AHRI 212365403	54.6(50 is the typical model of its size class)NU9WKU1with ductless indoor unit NU9WKU14 of 4 models have all five ratings · AHRI 212941744
Non-ducted, 2 tons	84.3(50 is the typical model of its size class) (higher)CCOXHASZ24HPwith ductless indoor unit CCOXHAWM241 of 1 models have all five ratings · AHRI 212365407	27.2(50 is the typical model of its size class)NU24WKU1with ductless indoor unit NU24WKU11 of 1 models have all five ratings · AHRI 212941747
Non-ducted, 2.5–3 tons	82.8(50 is the typical model of its size class) (higher)CCOXHAMZ436HP4 of 4 models have all five ratings · AHRI 212365436	66.7(50 is the typical model of its size class)N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-M5 of 5 models have all five ratings · AHRI 212941758
Non-ducted, 3.5–4.5 tons	77.9(50 is the typical model of its size class) (higher)CCOXHAMZ548HP4 of 4 models have all five ratings · AHRI 212365439	48.3(50 is the typical model of its size class)N5OG-48HFN1-MAlso listed as N2OA-48HFN1-M4 of 4 models have all five ratings · AHRI 212941764

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	Custom Comfort	Nutech
COP at 5°F	beats 91% · 2.21CCOXHASZ24HPNon-ducted, 2 tons	beats 87% · 2.01NU36WKU1Non-ducted, 2.5–3 tons
Capacity retention at 5°F	beats 97% · 103%CCOXHAMZ327HPNon-ducted, 2.5–3 tons	beats 92% · 108%NOD30-24HFN1-MU0WDucted, 2 tons
HSPF2	beats 99% · 10.3CCOXHASZ48CHPDucted, 3.5–4.5 tons	beats 95% · 9.7N5OG-48HFN1-MAlso listed as N2OA-48HFN1-MDucted, 3.5–4.5 tons
SEER2	beats 99% · 20.9CCOXHAMZ548HPDucted, 3.5–4.5 tons	beats 98% · 21.0N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-MDucted, 2.5–3 tons
EER2	beats 98% · 16.2CCOXHASZ09HPNon-ducted, up to 1.5 tons	beats 75% · 12.2N3OJ-27HFN1-MAlso listed as N2OA-27HFN1-MNon-ducted, 2.5–3 tons
Heating capacity at 5°F	beats 100% · 57,600 Btu/hCCOXHASZ60CHPDucted, 3.5–4.5 tons	beats 93% · 27,000 Btu/hNOD30-24HFN1-MU0WDucted, 2 tons

More comparisons

Pick any two manufacturers

Custom Comfort vs Nutech heat pumps