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 SEA BREEZE+ 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 4 of the 6 ratings.

Custom Comfort
SEA BREEZE+
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	SEA BREEZE+
Efficiency index	65%median —	66%median —
COP at 5°F	50% (higher)median 1.98	46% (higher)median 1.90
Capacity retention at 5°F	83% (higher)median 89%	68% (higher)median 85%
HSPF2	84% (higher)median 9.9	78% (higher)median 10.6
SEER2	65%median 18.6	73%median 21.0
EER2	51%median 11.7	62%median 12.5
Heating capacity at 5°F	80% (higher)median 29,900 Btu/h	66% (higher)median 20,000 Btu/h
Outdoor models	20	19
AHRI certifications	69	69

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Custom Comfort	SEA BREEZE+
CEE 2025 Tier 1 (Split ASHP)	75%15 models	89.5%17 models
CEE 2026 Tier 1 (Split ASHP)	75%15 models	84.2%16 models
CEE Advanced Tier (Split ASHP)	5%1 models	5.3%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	85%17 models	84.2%16 models
DOE Cold Climate Heat Pump Challenge	5%1 models	5.3%1 models
ENERGY STAR Cold Climate	100%20 models	89.5%17 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
SEA BREEZE+
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	SEA BREEZE+
Ducted, up to 1.5 tons	5 · index 63%	8 · index 67%
Ducted, 2 tons	2 · index 67%	4 · index 78%
Ducted, 2.5–3 tons	5 · index 63%	4 · index 62%
Ducted, 3.5–4.5 tons	6 · index 60%	2 · index 63%
Non-ducted, up to 1.5 tons	5 · index 75%	8 · index 70%
Non-ducted, 2 tons	1 · index 84%	4 · index 69%
Non-ducted, 2.5–3 tons	4 · index 69%	4 · index 61%
Non-ducted, 3.5–4.5 tons	4 · index 54%	3 · 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	SEA BREEZE+Cold-climate score, best model
Ducted, up to 1.5 tons	74.9(50 is the typical model of its size class)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models qualify · AHRI 212365415	74.9(50 is the typical model of its size class)HSZ9H424ZMOwith ducted air handler D9H424ZMI7 of 8 models qualify · AHRI 212595646
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	80.3(50 is the typical model of its size class) (higher)SZ24H424ZMOwith ducted air handler D24H424ZMI4 of 4 models qualify · AHRI 208128279
Ducted, 2.5–3 tons	80.4(50 is the typical model of its size class) (higher)CCOXHAMZ327HP5 of 5 models qualify · AHRI 212631691	70.6(50 is the typical model of its size class)CSZ36H424ZMOwith ducted air handler AH36H424ZMI3 of 4 models qualify · AHRI 211126514
Ducted, 3.5–4.5 tons	86.4(50 is the typical model of its size class) (higher)CCOXHASZ48CHPwith ducted air handler CCOXHASD486 of 6 models qualify · AHRI 212365420	60.7(50 is the typical model of its size class)HMZ48H424ZMO1 of 2 models qualify · AHRI 208816899
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	86.0(50 is the typical model of its size class)SZ9H424ZMOwith ductless indoor unit WM9H424ZMI7 of 8 models qualify · AHRI 208674954
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	86.1(50 is the typical model of its size class)HSZ24H424ZMOwith ductless indoor unit CA24H424ZMI4 of 4 models qualify · AHRI 212595654
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	75.0(50 is the typical model of its size class)CSZ36H424ZMOwith ductless indoor unit CA36H424ZMI3 of 4 models qualify · AHRI 208128274
Non-ducted, 3.5–4.5 tons	76.8(50 is the typical model of its size class) (higher)CCOXHASZ60CHPwith ductless indoor unit CCOXHAFC604 of 4 models qualify · AHRI 212365428	76.0(50 is the typical model of its size class)CSZ48H424ZMOwith ductless indoor unit CA48H424ZMI2 of 3 models qualify · AHRI 208128275

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	SEA BREEZE+All-around score, best model
Ducted, up to 1.5 tons	85.2(50 is the typical model of its size class)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models have all five ratings · AHRI 212365415	85.2(50 is the typical model of its size class)HSZ9H424ZMOwith ducted air handler D9H424ZMI8 of 8 models have all five ratings · AHRI 212595646
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	83.8(50 is the typical model of its size class) (higher)SZ24H424ZMOwith ducted air handler D24H424ZMI4 of 4 models have all five ratings · AHRI 208128279
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	74.6(50 is the typical model of its size class)HMZ28H424ZMO4 of 4 models have all five ratings · AHRI 208128295
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)MZ48H424ZMO2 of 2 models have all five ratings · AHRI 208128292
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	86.7(50 is the typical model of its size class)SZ9H424ZMOwith ductless indoor unit WM9H424ZMI8 of 8 models have all five ratings · AHRI 208674954
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	77.4(50 is the typical model of its size class)HMZ24H424ZMO4 of 4 models have all five ratings · AHRI 208816895
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	70.8(50 is the typical model of its size class)HMZ36H424ZMO4 of 4 models have all five ratings · AHRI 208128297
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)MZ48H424ZMO3 of 3 models have all five ratings · AHRI 208128291

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	SEA BREEZE+
COP at 5°F	beats 91% · 2.21CCOXHASZ24HPNon-ducted, 2 tons	beats 98% · 2.45SZ12H424ZMONon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 97% · 103%CCOXHAMZ327HPNon-ducted, 2.5–3 tons	beats 96% · 105%HMZ24H424ZMONon-ducted, 2 tons
HSPF2	beats 99% · 10.3CCOXHASZ48CHPDucted, 3.5–4.5 tons	beats 98% · 12.0HSZ9H424ZMODucted, up to 1.5 tons
SEER2	beats 99% · 20.9CCOXHAMZ548HPDucted, 3.5–4.5 tons	beats 98% · 21.3MZ27H424ZMODucted, 2 tons
EER2	beats 98% · 16.2CCOXHASZ09HPNon-ducted, up to 1.5 tons	beats 95% · 15.8HSZ9H424ZMONon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 100% · 57,600 Btu/hCCOXHASZ60CHPDucted, 3.5–4.5 tons	beats 98% · 41,000 Btu/hCSZ36H424ZMONon-ducted, 2.5–3 tons

More comparisons

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Custom Comfort vs SEA BREEZE+ heat pumps