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Custom Comfort vs SEA BREEZE+ heat pumps

Measured against models of the same size and duct type, Custom Comfort scores higher on 4 of the 6 ratings. Custom Comfort has 28 outdoor models, SEA BREEZE+ has 23 outdoor models. Custom Comfort and SEA BREEZE+ have no QMID on file and are not ranked.

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CompareData as of updated · sources

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
Custom C…SEA BREE…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCustom ComfortSEA BREEZE+
Efficiency index71% (higher)median —68% (higher)median —
COP at 5°F64%median 2.0065%median 2.02
Capacity retention at 5°F71% (higher)median 91%64% (higher)median 83%
HSPF284% (higher)median 10.678% (higher)median 10.7
SEER269%median 20.870%median 22.0
EER267% (higher)median 12.365% (higher)median 12.5
Heating capacity at 5°F72% (higher)median 22,900 Btu/h66% (higher)median 23,000 Btu/h
Outdoor models2823
AHRI certifications10383

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCustom ComfortSEA BREEZE+
CEE 2025 Tier 1 (Split ASHP)96.4%27 models91.3%21 models
CEE 2026 Tier 1 (Split ASHP)96.4%27 models91.3%21 models
CEE Advanced Tier (Split ASHP)3.6%1 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)100%28 models87%20 models
DOE Cold Climate Heat Pump Challenge3.6%1 models0%0 models
ENERGY STAR Cold Climate100%28 models87%20 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
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsDucted, 5 tons and up2.00321 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 modelsNon-ducted, 5 tons and up2.0585 modelsmedian

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

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeCustom ComfortSEA BREEZE+
Ducted, up to 1.5 tons10 · index 78%8 · index 78%
Ducted, 2 tons4 · index 71%3 · index 74%
Ducted, 2.5–3 tons7 · index 72%5 · index 63%
Ducted, 3.5–4.5 tons6 · index 64%3 · index 84%
Ducted, 5 tons and upNone1 · index 63%
Non-ducted, up to 1.5 tons10 · index 75%8 · index 73%
Non-ducted, 2 tons2 · index 82%2 · index 82%
Non-ducted, 2.5–3 tons6 · index 65%7 · index 57%
Non-ducted, 3.5–4.5 tons4 · index 51%5 · index 54%
Non-ducted, 5 tons and upNone1 · index 59%

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 typeCustom ComfortCold-climate score, best modelSEA BREEZE+Cold-climate score, best model
Ducted, up to 1.5 tons93.5(50 is the typical model of its size class) (higher)CCOXHBSZ06HPwith ducted air handler CCOXHBSD0610 of 10 models qualify · AHRI 21574598382.3(50 is the typical model of its size class)HSZ18H525ZMOwith ducted air handler D18H525ZMI8 of 8 models qualify · AHRI 216014134
Ducted, 2 tons85.7(50 is the typical model of its size class)CCOXHBSZ24HPwith ducted air handler CCOXHBSD244 of 4 models qualify · AHRI 21574598785.7(50 is the typical model of its size class)HSZ24H525ZMOwith ducted air handler D24H525ZMI3 of 3 models qualify · AHRI 216014138
Ducted, 2.5–3 tons83.2(50 is the typical model of its size class) (higher)CCOXHBSZ36CHPwith ducted air handler CCOXHBSD367 of 7 models qualify · AHRI 21574599982.5(50 is the typical model of its size class)HMZ36H525ZMO3 of 5 models qualify · AHRI 216014166
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)CCOXHBMZ648HP6 of 6 models qualify · AHRI 21574601582.7(50 is the typical model of its size class)HMZ48H525ZMO3 of 3 models qualify · AHRI 216014169
Ducted, 5 tons and upNo models in this size classNone on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons96.7(50 is the typical model of its size class) (higher)CCOXHBSZ06HPwith ductless indoor unit CCOXHBWM0610 of 10 models qualify · AHRI 21574597389.5(50 is the typical model of its size class)SZ09H525ZMOwith ductless indoor unit C09H525ZMI8 of 8 models qualify · AHRI 216014100
Non-ducted, 2 tons89.4(50 is the typical model of its size class)CCOXHBSZ24HPwith ductless indoor unit CCOXHB4C242 of 2 models qualify · AHRI 21574598289.4(50 is the typical model of its size class)HSZ24H525ZMOwith ductless indoor unit CA24H525ZMI2 of 2 models qualify · AHRI 216014136
Non-ducted, 2.5–3 tons89.4(50 is the typical model of its size class)CCOXHBSZ36CHPwith ductless indoor unit CCOXHBFC366 of 6 models qualify · AHRI 21574600289.4(50 is the typical model of its size class)CSZ36H525ZMOwith ductless indoor unit FC36H525ZMI5 of 7 models qualify · AHRI 216014140
Non-ducted, 3.5–4.5 tons73.4(50 is the typical model of its size class)CCOXHBMZ648HP4 of 4 models qualify · AHRI 21574601673.4(50 is the typical model of its size class)HMZ48H525ZMO5 of 5 models qualify · AHRI 216014170
Non-ducted, 5 tons and upNo models in this size classNone 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 typeCustom ComfortAll-around score, best modelSEA BREEZE+All-around score, best model
Ducted, up to 1.5 tons95.0(50 is the typical model of its size class) (higher)CCOXHBSZ06HPwith ducted air handler CCOXHBSD0610 of 10 models have all five ratings · AHRI 21574598386.5(50 is the typical model of its size class)HSZ09H525ZMOwith ducted air handler D09H525ZMI8 of 8 models have all five ratings · AHRI 216014123
Ducted, 2 tons78.8(50 is the typical model of its size class)CCOESBSZ24HPwith ducted air handler CCOXHBSD244 of 4 models have all five ratings · AHRI 21842583278.8(50 is the typical model of its size class)SZ24H525ZMOwith ducted air handler D24H525ZMI3 of 3 models have all five ratings · AHRI 216014116
Ducted, 2.5–3 tons83.6(50 is the typical model of its size class)CCOXHBMZ536HP7 of 7 models have all five ratings · AHRI 21574601283.6(50 is the typical model of its size class)HMZ36H525ZMO5 of 5 models have all five ratings · AHRI 216014166
Ducted, 3.5–4.5 tons83.9(50 is the typical model of its size class)CCOXHBMZ648HP6 of 6 models have all five ratings · AHRI 21574601585.1(50 is the typical model of its size class) (higher)MZ48H525ZMO3 of 3 models have all five ratings · AHRI 216014154
Ducted, 5 tons and upNo models in this size class62.5(50 is the typical model of its size class)MZ60H525ZMO1 of 1 models have all five ratings · AHRI 216014157
Non-ducted, up to 1.5 tons96.2(50 is the typical model of its size class) (higher)CCOXHBSZ06HPwith ductless indoor unit CCOXHBWM0610 of 10 models have all five ratings · AHRI 21574597392.6(50 is the typical model of its size class)SZ09H525ZMOwith ductless indoor unit C09H525ZMI8 of 8 models have all five ratings · AHRI 216014100
Non-ducted, 2 tons86.8(50 is the typical model of its size class)CCOESBSZ24HPwith ductless indoor unit CCOXHBWM242 of 2 models have all five ratings · AHRI 21796840286.8(50 is the typical model of its size class)SZ24H525ZMOwith ductless indoor unit WM24H525ZMI2 of 2 models have all five ratings · AHRI 216014113
Non-ducted, 2.5–3 tons78.3(50 is the typical model of its size class)CCOXHBMZ536HP6 of 6 models have all five ratings · AHRI 21574601178.3(50 is the typical model of its size class)HMZ36H525ZMO7 of 7 models have all five ratings · AHRI 216014165
Non-ducted, 3.5–4.5 tons75.6(50 is the typical model of its size class)CCOXHBMZ648HP4 of 4 models have all five ratings · AHRI 21574601475.6(50 is the typical model of its size class)HMZ48H525ZMO5 of 5 models have all five ratings · AHRI 216014168
Non-ducted, 5 tons and upNo models in this size class58.6(50 is the typical model of its size class)MZ60H525ZMO1 of 1 models have all five ratings · AHRI 216014156

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
RatingCustom ComfortSEA BREEZE+
COP at 5°Fbeats 99% · 2.51CCOESBSZ12HPNon-ducted, up to 1.5 tonsbeats 99% · 2.51SZ12H525ZMONon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 98% · 126%CCOXHBSZ09HPNon-ducted, up to 1.5 tonsbeats 98% · 126%HSZ09H525ZMONon-ducted, up to 1.5 tons
HSPF2beats 99% · 14.8CCOXHBSZ06HPNon-ducted, up to 1.5 tonsbeats 99% · 11.0HMZ48H525ZMODucted, 3.5–4.5 tons
SEER2beats 97% · 25.0CCOESBMZ427HPNon-ducted, 2.5–3 tonsbeats 97% · 25.0MZ27H525ZMONon-ducted, 2.5–3 tons
EER2beats 99% · 18.0CCOXHBSZ06HPNon-ducted, up to 1.5 tonsbeats 97% · 16.2SZ09H525ZMONon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 98% · 39,500 Btu/hCCOXHBSZ36CHPNon-ducted, 2.5–3 tonsbeats 98% · 39,500 Btu/hCSZ36H525ZMONon-ducted, 2.5–3 tons

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