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CanAir vs Viessmann heat pumps

Measured against models of the same size and duct type, CanAir scores higher on 3 of the 6 ratings. CanAir has 44 outdoor models, Viessmann has 43 outdoor models. CanAir and Viessmann 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.
CanAir and Viessmann 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, CanAir scores higher on 3 of the 6 ratings.
  • CanAir
  • Viessmann
  • Other ranked manufacturers
CanAirViessmann

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCanAirViessmann
Efficiency index64% (higher)median —60% (higher)median —
COP at 5°F65% (higher)median 2.0753% (higher)median 2.00
Capacity retention at 5°F61%median 82%72%median 88%
HSPF274%median 10.074%median 9.5
SEER266% (higher)median 21.159% (higher)median 17.0
EER260% (higher)median 12.049% (higher)median 11.0
Heating capacity at 5°F63%median 20,000 Btu/h74%median 25,000 Btu/h
Outdoor models4443
AHRI certifications157170

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCanAirViessmann
CEE 2025 Tier 1 (Split ASHP)93.2%41 models83.7%36 models
CEE 2026 Tier 1 (Split ASHP)93.2%41 models83.7%36 models
CEE Advanced Tier (Split ASHP)2.3%1 models4.7%2 models
Xcel Energy Colorado cold-climate ASHP (2025)90.9%40 models79.1%34 models
DOE Cold Climate Heat Pump Challenge2.3%1 models4.7%2 models
ENERGY STAR Cold Climate90.9%40 models69.8%30 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
  • CanAir
  • Viessmann
  • 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 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 typeCanAirViessmann
Ducted, up to 1.5 tons9 · index 76%8 · index 67%
Ducted, 2 tons4 · index 71%7 · index 59%
Ducted, 2.5–3 tons9 · index 65%16 · index 55%
Ducted, 3.5–4.5 tons8 · index 66%11 · index 57%
Ducted, 5 tons and up1 · index 65%None
Non-ducted, up to 1.5 tons19 · index 67%5 · index 77%
Non-ducted, 2 tons3 · index 65%2 · index 79%
Non-ducted, 2.5–3 tons9 · index 55%6 · index 57%
Non-ducted, 3.5–4.5 tons7 · index 47%4 · index 52%

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 typeCanAirCold-climate score, best modelViessmannCold-climate score, best model
Ducted, up to 1.5 tons82.3(50 is the typical model of its size class)4C28SCH18H21with ducted air handler 4C28SEDH18H219 of 9 models qualify · AHRI 21795897486.7(50 is the typical model of its size class) (higher)D5CUHAH18AAKwith ducted air handler D5MUWAQ18XA37 of 8 models qualify · AHRI 218668521
Ducted, 2 tons85.7(50 is the typical model of its size class)4C28SCH24H21with ducted air handler 4C28SEDH24H214 of 4 models qualify · AHRI 21795897585.7(50 is the typical model of its size class)D5CSHAH24AAKwith ducted air handler D5FSDAH24XHK7 of 7 models qualify · AHRI 217178805
Ducted, 2.5–3 tons83.2(50 is the typical model of its size class)4C28LCH36H21with ducted air handler 4C28LEDH36H216 of 9 models qualify · AHRI 21795897683.2(50 is the typical model of its size class)D5CMHAH36EAK11 of 16 models qualify · AHRI 217178827
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)4C28MC648H218 of 8 models qualify · AHRI 21544973482.7(50 is the typical model of its size class)D5CMHAH48FAK10 of 11 models qualify · AHRI 217178830
Ducted, 5 tons and upNone on this board (0 of 1 models qualify)No models in this size class
Non-ducted, up to 1.5 tons96.7(50 is the typical model of its size class)4C28SCH06H21with ductless indoor unit 4C28SEH06H2117 of 19 models qualify · AHRI 21544971696.7(50 is the typical model of its size class)D5CSHAH06AAKwith ductless indoor unit D5FSHAH06XAK5 of 5 models qualify · AHRI 217178781
Non-ducted, 2 tons89.4(50 is the typical model of its size class)4C28SCH24H21with ductless indoor unit 4C28SEQ24H213 of 3 models qualify · AHRI 21795895689.4(50 is the typical model of its size class)D5CSHAH24AAKwith ductless indoor unit D5FSCAH24XAK2 of 2 models qualify · AHRI 217178803
Non-ducted, 2.5–3 tons89.4(50 is the typical model of its size class)4C28LCH36H21with ductless indoor unit 4C28LEP36H217 of 9 models qualify · AHRI 21795893789.4(50 is the typical model of its size class)D5CLHAH36AAKwith ductless indoor unit D5FCFAH36XAK4 of 6 models qualify · AHRI 217178810
Non-ducted, 3.5–4.5 tons73.4(50 is the typical model of its size class)4C28MC648H216 of 7 models qualify · AHRI 21544973575.5(50 is the typical model of its size class) (higher)D5CMHAH48FAK4 of 4 models qualify · AHRI 217178831

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 typeCanAirAll-around score, best modelViessmannAll-around score, best model
Ducted, up to 1.5 tons86.7(50 is the typical model of its size class)4C28SCH09H21with ducted air handler 4C28SEDL09H219 of 9 models have all five ratings · AHRI 21795896287.4(50 is the typical model of its size class) (higher)D5CSHAH09AAKwith ducted air handler D5FSDAH12XAK8 of 8 models have all five ratings · AHRI 217178787
Ducted, 2 tons78.8(50 is the typical model of its size class)4C25SCH24H21with ducted air handler 4C28SEDH24H214 of 4 models have all five ratings · AHRI 21795896880.0(50 is the typical model of its size class) (higher)D5CSHAH24AAKwith ducted air handler D5FSDAH24XHK7 of 7 models have all five ratings · AHRI 217178805
Ducted, 2.5–3 tons83.6(50 is the typical model of its size class)4C28MC536H219 of 9 models have all five ratings · AHRI 21544973185.5(50 is the typical model of its size class) (higher)D5CMHAH30EAK16 of 16 models have all five ratings · AHRI 217178824
Ducted, 3.5–4.5 tons85.1(50 is the typical model of its size class) (higher)4C25MC548H218 of 8 models have all five ratings · AHRI 21795899384.6(50 is the typical model of its size class)D5CMHAH48FAK11 of 11 models have all five ratings · AHRI 217178830
Ducted, 5 tons and up65.3(50 is the typical model of its size class)4C25LCH60H21with ducted air handler 4C28LEDH60H211 of 1 models have all five ratings · AHRI 217958971No models in this size class
Non-ducted, up to 1.5 tons96.2(50 is the typical model of its size class)4C28SCH06H21with ductless indoor unit 4C28SEH06H2118 of 19 models have all five ratings · AHRI 21544971696.5(50 is the typical model of its size class) (higher)D5CSHAH06AAKwith ductless indoor unit D5FSHAH06XAK5 of 5 models have all five ratings · AHRI 217178781
Non-ducted, 2 tons86.8(50 is the typical model of its size class) (higher)4C25SCH24H21with ductless indoor unit 4C28SEH24H213 of 3 models have all five ratings · AHRI 21582839078.7(50 is the typical model of its size class)D5CSHAH24AAKwith ductless indoor unit D5FSHAH24XAK2 of 2 models have all five ratings · AHRI 217178802
Non-ducted, 2.5–3 tons78.3(50 is the typical model of its size class)4C28MC536H219 of 9 models have all five ratings · AHRI 21544973085.8(50 is the typical model of its size class) (higher)D5CMHAH30EAK6 of 6 models have all five ratings · AHRI 217178823
Non-ducted, 3.5–4.5 tons75.6(50 is the typical model of its size class)4C28MC648H217 of 7 models have all five ratings · AHRI 21544973376.7(50 is the typical model of its size class) (higher)D5CMHAH48FAK4 of 4 models have all five ratings · AHRI 217178829

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
RatingCanAirViessmann
COP at 5°Fbeats 99% · 2.514C25SCH12H21Non-ducted, up to 1.5 tonsbeats 97% · 2.40D5CSHAH06AAKNon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 98% · 120%4C28SCH09H21Ducted, up to 1.5 tonsbeats 100% · 116%D5CMHAH30EAKNon-ducted, 2.5–3 tons
HSPF2beats 99% · 14.84C28SCH06H21Non-ducted, up to 1.5 tonsbeats 99% · 14.8D5CSHAH06AAKNon-ducted, up to 1.5 tons
SEER2beats 99% · 33.34C35SCH09H21Non-ducted, up to 1.5 tonsbeats 99% · 20.5D5CMHAH48FAKDucted, 3.5–4.5 tons
EER2beats 99% · 18.04C28SCH06H21Non-ducted, up to 1.5 tonsbeats 99% · 18.0D5CSHAH06AAKNon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 99% · 22,600 Btu/h4C35SCH18H21Non-ducted, up to 1.5 tonsbeats 98% · 19,600 Btu/hD5CUHAH18AAKDucted, up to 1.5 tons

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