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Viessmann vs WHIRLPOOL heat pumps

Measured against models of the same size and duct type, Viessmann scores higher on 6 of the 6 ratings. Viessmann has 43 outdoor models, WHIRLPOOL has 42 outdoor models. Viessmann and WHIRLPOOL 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.
Viessmann and WHIRLPOOL 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, Viessmann scores higher on 6 of the 6 ratings.
  • Viessmann
  • WHIRLPOOL
  • Other ranked manufacturers
ViessmannWHIRLPOOL

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingViessmannWHIRLPOOL
Efficiency index60% (higher)median —26% (higher)median —
COP at 5°F53% (higher)median 2.0041% (higher)median 1.87
Capacity retention at 5°F72% (higher)median 88%21% (higher)median 47%
HSPF274% (higher)median 9.517% (higher)median 6.7
SEER259% (higher)median 17.017% (higher)median 13.4
EER249% (higher)median 11.033% (higher)median 10.6
Heating capacity at 5°F74% (higher)median 25,000 Btu/h22% (higher)median 19,550 Btu/h
Outdoor models4342
AHRI certifications170155

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardViessmannWHIRLPOOL
CEE 2025 Tier 1 (Split ASHP)83.7%36 models2.4%1 models
CEE 2026 Tier 1 (Split ASHP)83.7%36 models0%0 models
CEE Advanced Tier (Split ASHP)4.7%2 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)79.1%34 models4.8%2 models
DOE Cold Climate Heat Pump Challenge4.7%2 models0%0 models
ENERGY STAR Cold Climate69.8%30 models0%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 · 4 groups where both have models
  • Viessmann
  • WHIRLPOOL
  • 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 typeViessmannWHIRLPOOL
Ducted, up to 1.5 tons8 · index 67%2 · index 25%
Ducted, 2 tons7 · index 59%7 · index 25%
Ducted, 2.5–3 tons16 · index 55%12 · index 24%
Ducted, 3.5–4.5 tons11 · index 57%14 · index 28%
Ducted, 5 tons and upNone7 · index 26%
Non-ducted, up to 1.5 tons5 · index 77%None
Non-ducted, 2 tons2 · index 79%None
Non-ducted, 2.5–3 tons6 · index 57%None
Non-ducted, 3.5–4.5 tons4 · index 52%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 typeViessmannCold-climate score, best modelWHIRLPOOLCold-climate score, best model
Ducted, up to 1.5 tons86.7(50 is the typical model of its size class)D5CUHAH18AAKwith ducted air handler D5MUWAQ18XA37 of 8 models qualify · AHRI 218668521None on this board (0 of 2 models qualify)
Ducted, 2 tons85.7(50 is the typical model of its size class) (higher)D5CSHAH24AAKwith ducted air handler D5FSDAH24XHK7 of 7 models qualify · AHRI 21717880575.4(50 is the typical model of its size class)WLP15AY30AJ2Nwith ducted air handler AE*S+DM36A3J+TDR1 of 7 models qualify · AHRI 218687483
Ducted, 2.5–3 tons83.2(50 is the typical model of its size class) (higher)D5CMHAH36EAK11 of 16 models qualify · AHRI 21717882778.5(50 is the typical model of its size class)WLP15AY36AJ2Nwith ducted air handler AE*S+DM36A3J+TDR1 of 12 models qualify · AHRI 218687485
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)D5CMHAH48FAK10 of 11 models qualify · AHRI 217178830None on this board (0 of 14 models qualify)
Ducted, 5 tons and upNo models in this size classNone on this board (0 of 7 models qualify)
Non-ducted, up to 1.5 tons96.7(50 is the typical model of its size class)D5CSHAH06AAKwith ductless indoor unit D5FSHAH06XAK5 of 5 models qualify · AHRI 217178781No models in this size class
Non-ducted, 2 tons89.4(50 is the typical model of its size class)D5CSHAH24AAKwith ductless indoor unit D5FSCAH24XAK2 of 2 models qualify · AHRI 217178803No models in this size class
Non-ducted, 2.5–3 tons89.4(50 is the typical model of its size class)D5CLHAH36AAKwith ductless indoor unit D5FCFAH36XAK4 of 6 models qualify · AHRI 217178810No models in this size class
Non-ducted, 3.5–4.5 tons75.5(50 is the typical model of its size class)D5CMHAH48FAK4 of 4 models qualify · AHRI 217178831No 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 typeViessmannAll-around score, best modelWHIRLPOOLAll-around score, best model
Ducted, up to 1.5 tons87.4(50 is the typical model of its size class) (higher)D5CSHAH09AAKwith ducted air handler D5FSDAH12XAK8 of 8 models have all five ratings · AHRI 21717878734.5(50 is the typical model of its size class)WLP15AY18AJ2Nwith ducted air handler WLH2TY2417STANN2 of 2 models have all five ratings · AHRI 217536709
Ducted, 2 tons80.0(50 is the typical model of its size class) (higher)D5CSHAH24AAKwith ducted air handler D5FSDAH24XHK7 of 7 models have all five ratings · AHRI 21717880556.7(50 is the typical model of its size class)WLP15AY30AJ2Nwith ducted air handler AE*S+DM36A3J+TDR6 of 6 models have all five ratings · AHRI 218687483
Ducted, 2.5–3 tons85.5(50 is the typical model of its size class) (higher)D5CMHAH30EAK16 of 16 models have all five ratings · AHRI 21717882463.1(50 is the typical model of its size class)WLP15AY36AJ2Nwith ducted air handler AE*S+DM36A3J+TDR12 of 12 models have all five ratings · AHRI 218687485
Ducted, 3.5–4.5 tons84.6(50 is the typical model of its size class) (higher)D5CMHAH48FAK11 of 11 models have all five ratings · AHRI 21717883054.4(50 is the typical model of its size class)WLP15AY42AJ2Nwith ducted air handler WLH2TY4824STANN14 of 14 models have all five ratings · AHRI 217619601
Ducted, 5 tons and upNo models in this size class56.6(50 is the typical model of its size class)WLP15AY60AJ2Nwith ducted air handler WLH2TY6024STANN8 of 8 models have all five ratings · AHRI 217536707
Non-ducted, up to 1.5 tons96.5(50 is the typical model of its size class)D5CSHAH06AAKwith ductless indoor unit D5FSHAH06XAK5 of 5 models have all five ratings · AHRI 217178781No models in this size class
Non-ducted, 2 tons78.7(50 is the typical model of its size class)D5CSHAH24AAKwith ductless indoor unit D5FSHAH24XAK2 of 2 models have all five ratings · AHRI 217178802No models in this size class
Non-ducted, 2.5–3 tons85.8(50 is the typical model of its size class)D5CMHAH30EAK6 of 6 models have all five ratings · AHRI 217178823No models in this size class
Non-ducted, 3.5–4.5 tons76.7(50 is the typical model of its size class)D5CMHAH48FAK4 of 4 models have all five ratings · AHRI 217178829No 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
RatingViessmannWHIRLPOOL
COP at 5°Fbeats 97% · 2.40D5CSHAH06AAKNon-ducted, up to 1.5 tonsbeats 97% · 2.73WLP15AY36AJ2NDucted, 2.5–3 tons
Capacity retention at 5°Fbeats 100% · 116%D5CMHAH30EAKNon-ducted, 2.5–3 tonsbeats 100% · 127%WLP15AY30AJ2NDucted, 2 tons
HSPF2beats 99% · 14.8D5CSHAH06AAKNon-ducted, up to 1.5 tonsbeats 56% · 7.8WLP15AY60AJ2NDucted, 5 tons and up
SEER2beats 99% · 20.5D5CMHAH48FAKDucted, 3.5–4.5 tonsbeats 50% · 16.0WLP15AY42AJ2NDucted, 3.5–4.5 tons
EER2beats 99% · 18.0D5CSHAH06AAKNon-ducted, up to 1.5 tonsbeats 68% · 11.7WLP15AY60AJ2NDucted, 5 tons and up
Heating capacity at 5°Fbeats 98% · 19,600 Btu/hD5CUHAH18AAKDucted, up to 1.5 tonsbeats 100% · 34,600 Btu/hWLP15AY30AJ2NDucted, 2 tons

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