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Custom Comfort vs MAXI AIR 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 20 outdoor models, MAXI AIR has 19 outdoor models. Custom Comfort and MAXI AIR 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 MAXI AIR 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
  • MAXI AIR
  • Other ranked manufacturers
Custom C…MAXI AIR

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCustom ComfortMAXI AIR
Efficiency index65%median —67%median —
COP at 5°F50% (higher)median 1.9841% (higher)median 1.87
Capacity retention at 5°F83% (higher)median 89%70% (higher)median 86%
HSPF284% (higher)median 9.975% (higher)median 10.3
SEER265%median 18.676%median 22.2
EER251%median 11.763%median 12.5
Heating capacity at 5°F80% (higher)median 29,900 Btu/h68% (higher)median 18,000 Btu/h
Outdoor models2019
AHRI certifications6945

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCustom ComfortMAXI AIR
CEE 2025 Tier 1 (Split ASHP)75%15 models68.4%13 models
CEE 2026 Tier 1 (Split ASHP)75%15 models68.4%13 models
CEE Advanced Tier (Split ASHP)5%1 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)85%17 models73.7%14 models
DOE Cold Climate Heat Pump Challenge5%1 models0%0 models
ENERGY STAR Cold Climate100%20 models52.6%10 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 · 5 groups where both have models
  • Custom Comfort
  • MAXI AIR
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsNon-ducted, 3.5–4.5 tons1.97438 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 ComfortMAXI AIR
Ducted, up to 1.5 tons5 · index 63%None
Ducted, 2 tons2 · index 67%2 · index —
Ducted, 2.5–3 tons5 · index 63%7 · index 67%
Ducted, 3.5–4.5 tons6 · index 60%1 · index 53%
Non-ducted, up to 1.5 tons5 · index 75%9 · index 64%
Non-ducted, 2 tons1 · index 84%None
Non-ducted, 2.5–3 tons4 · index 69%4 · index 78%
Non-ducted, 3.5–4.5 tons4 · index 54%None

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 modelMAXI AIRCold-climate score, best model
Ducted, up to 1.5 tons74.9(50 is the typical model of its size class)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models qualify · AHRI 212365415No models in this size class
Ducted, 2 tons79.4(50 is the typical model of its size class)CCOXHASZ24HPwith ducted air handler CCOXHASD242 of 2 models qualify · AHRI 212365418None on this board (0 of 2 models qualify)
Ducted, 2.5–3 tons80.4(50 is the typical model of its size class) (higher)CCOXHAMZ327HP5 of 5 models qualify · AHRI 21263169167.8(50 is the typical model of its size class)MAXS-2430with ducted air handler NE-F52-MAC36HWD6 of 7 models qualify · AHRI 213265613
Ducted, 3.5–4.5 tons86.4(50 is the typical model of its size class) (higher)CCOXHASZ48CHPwith ducted air handler CCOXHASD486 of 6 models qualify · AHRI 21236542071.3(50 is the typical model of its size class)MAXS-4260with ducted air handler AHMS-60201 of 1 models qualify · AHRI 210426581
Non-ducted, up to 1.5 tons89.3(50 is the typical model of its size class) (higher)CCOXHASZ06HPwith ductless indoor unit CCOXHAWM065 of 5 models qualify · AHRI 21236540370.6(50 is the typical model of its size class)YS21F-18HRDN1with ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT8 of 9 models qualify · AHRI 203238010
Non-ducted, 2 tons86.1(50 is the typical model of its size class)CCOXHASZ24HPwith ductless indoor unit CCOXHA4C241 of 1 models qualify · AHRI 212365412No models in this size class
Non-ducted, 2.5–3 tons83.1(50 is the typical model of its size class) (higher)CCOXHAMZ327HP4 of 4 models qualify · AHRI 21263169079.3(50 is the typical model of its size class)NE-T53-MULTI36EAlso listed as NE-T53-MULTI36E4 of 4 models qualify · AHRI 213927622
Non-ducted, 3.5–4.5 tons76.8(50 is the typical model of its size class)CCOXHASZ60CHPwith ductless indoor unit CCOXHAFC604 of 4 models qualify · AHRI 212365428No models in this size class

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 modelMAXI AIRAll-around score, best model
Ducted, up to 1.5 tons85.2(50 is the typical model of its size class)CCOXHASZ09HPwith ducted air handler CCOXHASD095 of 5 models have all five ratings · AHRI 212365415No models in this size class
Ducted, 2 tons80.1(50 is the typical model of its size class)CCOXHASZ24HPwith ducted air handler CCOXHASD242 of 2 models have all five ratings · AHRI 212365418None on this board (0 of 2 models have all five ratings)
Ducted, 2.5–3 tons81.9(50 is the typical model of its size class) (higher)CCOXHAMZ327HP5 of 5 models have all five ratings · AHRI 21263169174.6(50 is the typical model of its size class)NE-T53-MULTI28EAlso listed as NE-T53-MULTI28E6 of 7 models have all five ratings · AHRI 213927620
Ducted, 3.5–4.5 tons82.0(50 is the typical model of its size class) (higher)CCOXHAMZ548HP6 of 6 models have all five ratings · AHRI 21236544053.3(50 is the typical model of its size class)MAXS-4260with ducted air handler AHMS-60201 of 1 models have all five ratings · AHRI 210426581
Non-ducted, up to 1.5 tons92.0(50 is the typical model of its size class) (higher)CCOXHASZ06HPwith ductless indoor unit CCOXHAWM065 of 5 models have all five ratings · AHRI 21236540375.9(50 is the typical model of its size class)YS21F-18HRDN1with ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT9 of 9 models have all five ratings · AHRI 203238010
Non-ducted, 2 tons84.3(50 is the typical model of its size class)CCOXHASZ24HPwith ductless indoor unit CCOXHAWM241 of 1 models have all five ratings · AHRI 212365407No models in this size class
Non-ducted, 2.5–3 tons82.8(50 is the typical model of its size class)CCOXHAMZ436HP4 of 4 models have all five ratings · AHRI 21236543682.8(50 is the typical model of its size class)NE-T53-MULTI36EAlso listed as NE-T53-MULTI36E4 of 4 models have all five ratings · AHRI 213927622
Non-ducted, 3.5–4.5 tons77.9(50 is the typical model of its size class)CCOXHAMZ548HP4 of 4 models have all five ratings · AHRI 212365439No models in this size class

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 ComfortMAXI AIR
COP at 5°Fbeats 91% · 2.21CCOXHASZ24HPNon-ducted, 2 tonsbeats 96% · 2.38YS21F-18HRDN1Also listed as NE-T52-PLA18INTNon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 97% · 103%CCOXHAMZ327HPNon-ducted, 2.5–3 tonsbeats 85% · 97%NE-T53-MULTI36EAlso listed as NE-T53-MULTI36ENon-ducted, 2.5–3 tons
HSPF2beats 99% · 10.3CCOXHASZ48CHPDucted, 3.5–4.5 tonsbeats 95% · 10.6NE-T53-MULTI28EAlso listed as NE-T53-MULTI28ENon-ducted, 2.5–3 tons
SEER2beats 99% · 20.9CCOXHAMZ548HPDucted, 3.5–4.5 tonsbeats 92% · 20.0NE-T53-MULTI28EAlso listed as NE-T53-MULTI28EDucted, 2.5–3 tons
EER2beats 98% · 16.2CCOXHASZ09HPNon-ducted, up to 1.5 tonsbeats 96% · 13.6NE-T53-MULTI36EAlso listed as NE-T53-MULTI36ENon-ducted, 2.5–3 tons
Heating capacity at 5°Fbeats 100% · 57,600 Btu/hCCOXHASZ60CHPDucted, 3.5–4.5 tonsbeats 95% · 48,500 Btu/hMAXS-4260Ducted, 3.5–4.5 tons

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