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TGM vs Viessmann heat pumps

Measured against models of the same size and duct type, Viessmann scores higher on 4 of the 6 ratings. TGM has 54 outdoor models, Viessmann has 53 outdoor models. TGM 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.
TGM 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, Viessmann scores higher on 4 of the 6 ratings.
  • TGM
  • Viessmann
  • Other ranked manufacturers
TGMViessmann

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingTGMViessmann
Efficiency index52%median —53%median —
COP at 5°F43%median 1.8352%median 1.95
Capacity retention at 5°F47%median 70%50%median 67%
HSPF246%median 8.563%median 9.2
SEER247%median 16.658%median 18.7
EER247% (higher)median 11.346% (higher)median 10.7
Heating capacity at 5°F51% (higher)median 15,750 Btu/h50% (higher)median 18,000 Btu/h
Outdoor models5453
AHRI certifications87123

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardTGMViessmann
CEE 2025 Tier 1 (Split ASHP)31.5%17 models64.2%34 models
CEE 2026 Tier 1 (Split ASHP)31.5%17 models60.4%32 models
CEE Advanced Tier (Split ASHP)0%0 models3.8%2 models
Xcel Energy Colorado cold-climate ASHP (2025)24.1%13 models43.4%23 models
DOE Cold Climate Heat Pump Challenge0%0 models3.8%2 models
ENERGY STAR Cold Climate13%7 models47.2%25 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 · 9 groups where both have models
  • TGM
  • Viessmann
  • 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 modelsDucted, 5 tons and up1.90239 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 typeTGMViessmann
Ducted, up to 1.5 tons5 · index 66%6 · index 61%
Ducted, 2 tons6 · index 73%4 · index 65%
Ducted, 2.5–3 tons10 · index 57%9 · index 55%
Ducted, 3.5–4.5 tons11 · index 53%6 · index 59%
Ducted, 5 tons and up1 · index 75%2 · index 49%
Non-ducted, up to 1.5 tons13 · index 41%20 · index 53%
Non-ducted, 2 tons3 · index 75%4 · index 47%
Non-ducted, 2.5–3 tons11 · index 49%11 · index 47%
Non-ducted, 3.5–4.5 tons3 · index 46%5 · index 46%

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 typeTGMCold-climate score, best modelViessmannCold-climate score, best model
Ducted, up to 1.5 tons67.8(50 is the typical model of its size class)MRSVHT12ASwith ducted air handler MFCHT12S2 of 5 models qualify · AHRI 20984301781.3(50 is the typical model of its size class) (higher)DLCSRBH18AAKwith ducted air handler DLFSDAH18XHK5 of 6 models qualify · AHRI 215569862
Ducted, 2 tons82.4(50 is the typical model of its size class) (higher)MRSVHT24ASwith ducted air handler MFCHT24S1 of 5 models qualify · AHRI 20984301979.4(50 is the typical model of its size class)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models qualify · AHRI 215569794
Ducted, 2.5–3 tons55.3(50 is the typical model of its size class)GTS18HN036Awith ducted air handler GTA18H036A1 of 11 models qualify · AHRI 21062772178.6(50 is the typical model of its size class) (higher)DLCURAH36ABKwith ducted air handler DLFULAH36XCX + CI3 of 9 models qualify · AHRI 215569769
Ducted, 3.5–4.5 tons58.1(50 is the typical model of its size class)GTS18HN060Awith ducted air handler GTA18H048A1 of 11 models qualify · AHRI 21062772374.9(50 is the typical model of its size class) (higher)DLCMHBH48EAK4 of 6 models qualify · AHRI 215569823
Ducted, 5 tons and up70.2(50 is the typical model of its size class)MRB60HWD1 of 1 models qualify · AHRI 203258672None on this board (0 of 2 models qualify)
Non-ducted, up to 1.5 tons77.5(50 is the typical model of its size class)MRAPT12ASwith ductless indoor unit MWAPT12S8 of 13 models qualify · AHRI 20955032495.0(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK11 of 20 models qualify · AHRI 215569835
Non-ducted, 2 tons74.2(50 is the typical model of its size class)MRSVHT24ASwith ductless indoor unit MUVHT24S2 of 3 models qualify · AHRI 20984302486.1(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ductless indoor unit DLFSCBH24XAK2 of 4 models qualify · AHRI 215569833
Non-ducted, 2.5–3 tons49.3(50 is the typical model of its size class)MMRSHT27AS32 of 11 models qualify · AHRI 20984304873.4(50 is the typical model of its size class) (higher)DLCMHBH36DAK2 of 11 models qualify · AHRI 215569824
Non-ducted, 3.5–4.5 tons56.3(50 is the typical model of its size class)MRSVHT48ASwith ductless indoor unit MUVHT48S2 of 3 models qualify · AHRI 20984302680.5(50 is the typical model of its size class) (higher)DLCMHBH48EAK3 of 5 models qualify · AHRI 215569822

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 typeTGMAll-around score, best modelViessmannAll-around score, best model
Ducted, up to 1.5 tons78.5(50 is the typical model of its size class)MRSVHT18ASwith ducted air handler MFCHT18S3 of 5 models have all five ratings · AHRI 20984301885.2(50 is the typical model of its size class) (higher)DLCSRBH09AAKwith ducted air handler DLFSDAH09XAK6 of 6 models have all five ratings · AHRI 215569786
Ducted, 2 tons84.9(50 is the typical model of its size class) (higher)MRSVHT24ASwith ducted air handler MFCHT24S2 of 6 models have all five ratings · AHRI 20984301980.1(50 is the typical model of its size class)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models have all five ratings · AHRI 215569794
Ducted, 2.5–3 tons75.4(50 is the typical model of its size class) (higher)MMRSHT27AS33 of 10 models have all five ratings · AHRI 20984304972.0(50 is the typical model of its size class)DLCMHBH30DAK9 of 9 models have all five ratings · AHRI 215569818
Ducted, 3.5–4.5 tons63.5(50 is the typical model of its size class)MMRSHT48AS53 of 11 models have all five ratings · AHRI 20984305582.0(50 is the typical model of its size class) (higher)DLCMHBH48EAK6 of 6 models have all five ratings · AHRI 215569823
Ducted, 5 tons and up75.1(50 is the typical model of its size class) (higher)MRB60HWD1 of 1 models have all five ratings · AHRI 20325867257.1(50 is the typical model of its size class)DLCLRCH58AAKwith ducted air handler DLFLDAH58XAK2 of 2 models have all five ratings · AHRI 215569836
Non-ducted, up to 1.5 tons83.0(50 is the typical model of its size class)MRAPT12ASwith ductless indoor unit MWAPT12S13 of 13 models have all five ratings · AHRI 20955032493.6(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK20 of 20 models have all five ratings · AHRI 215569835
Non-ducted, 2 tons77.5(50 is the typical model of its size class)MRAPT24ASwith ductless indoor unit MWAPT24S2 of 3 models have all five ratings · AHRI 20955032584.3(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ductless indoor unit DLFSHCH24XAK4 of 4 models have all five ratings · AHRI 215569840
Non-ducted, 2.5–3 tons66.7(50 is the typical model of its size class)MMRSHT27AS36 of 11 models have all five ratings · AHRI 20984304870.8(50 is the typical model of its size class) (higher)DLCMHBH36DAK11 of 11 models have all five ratings · AHRI 215569824
Non-ducted, 3.5–4.5 tons51.7(50 is the typical model of its size class)MMRSHT48AS52 of 3 models have all five ratings · AHRI 20984305473.8(50 is the typical model of its size class) (higher)DLCMHBH48EAK5 of 5 models have all five ratings · AHRI 215569822

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
RatingTGMViessmann
COP at 5°Fbeats 91% · 2.27MRSVHT12ASNon-ducted, up to 1.5 tonsbeats 99% · 2.89DLCPRBH18AAKNon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 92% · 70%MRB60HWDDucted, 5 tons and upbeats 97% · 120%DLCPRBH18AAKNon-ducted, up to 1.5 tons
HSPF2beats 98% · 11.2MRSVHT24ASDucted, 2 tonsbeats 100% · 15.0DLCPRBH09AAKNon-ducted, up to 1.5 tons
SEER2beats 98% · 21.0MMRSHT27AS3Ducted, 2.5–3 tonsbeats 99% · 20.9DLCMHBH48EAKDucted, 3.5–4.5 tons
EER2beats 97% · 14.0MRAPT24ASNon-ducted, 2 tonsbeats 98% · 16.2DLCSRBH09AAKNon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 91% · 40,000 Btu/hMRB60HWDDucted, 5 tons and upbeats 100% · 24,000 Btu/hDLCPRBH18AAKNon-ducted, up to 1.5 tons

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