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TKS heat pump efficiency: 8 outdoor models compared

TKS has 8 heat pump outdoor models certified with this refrigerant group, in 8 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes TKS makes. TKS has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of updated · sources

Outdoor models
8
AHRI certifications
8
Efficiency index
31%
Typical model vs same-size, same-type peers (8 models)
Meet CEE 2025
75%
6 models

How TKS compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.
TKS against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of TKS’s own modelsTKS is strongest on capacity retention at 5°F (its typical model beats 43% of comparable models) and weakest on HSPF2 (16%).
  • TKS
  • Middle half of its models
  • Other ranked manufacturers
TKS

Source: AHRI Directory, NEEP · as of

Average peer percentile of TKS’s models
RatingBeats comparable modelsRankRaw median
Efficiency index8 models scored31%Not ranked—
COP at 5°F8 models scored23%Not ranked1.81
Capacity retention at 5°F8 models scored43%Not ranked74%
HSPF28 models scored16%Not ranked8.5
SEER28 models scored35%Not ranked20.3
EER28 models scored36%Not ranked11.9
Heating capacity at 5°F8 models scored36%Not ranked10,600 Btu/h

Standards met

Share of TKS’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)75%6
CEE 2026 Tier 1 (Split ASHP)75%6
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)100%8
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate0%0

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
TKS’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line
  • TKS (median, middle 50%, 10th–90th)
  • All models of the group
Non-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Non-ducted, up to 1.5 tons531%33%16%30%
Non-ducted, 2 tons125%2%12%26%
Non-ducted, 2.5–3 tons237%7%17%54%

Every TKS model in the market

TKS’s 8 models with a known size and duct type, over the shape of the whole catalog.
TKS models by size and ratingColoured: TKS · grey shapes: all 14,508 models · lines: catalog medians by size
  • TKS models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 8 tks models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 models, half a ton at a time.
Show the data as a table
COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, sizeModels10th pct.25thMedian75th90th
Ducted, 0.5 tons8261.641.711.751.852.24
Ducted, 1 ton4071.801.902.052.412.45
Ducted, 1.5 tons9921.751.862.002.172.40
Ducted, 2 tons9991.751.862.002.182.30
Ducted, 2.5 tons1,0401.701.802.002.102.36
Ducted, 3 tons6961.801.902.002.102.42
Ducted, 3.5 tons8641.701.802.002.102.46
Ducted, 4 tons7271.801.862.002.122.40
Ducted, 4.5 tons6901.701.801.902.102.20
Ducted, 5 tons861.892.002.102.102.10
Non-ducted, 0.5 tons1,1861.751.801.902.002.22
Non-ducted, 1 ton1,3431.801.801.992.102.21
Non-ducted, 1.5 tons1,2611.801.802.002.102.31
Non-ducted, 2 tons7611.801.982.002.102.30
Non-ducted, 2.5 tons4031.801.852.002.002.10
Non-ducted, 3 tons4731.901.982.002.032.20
Non-ducted, 3.5 tons2802.002.002.002.052.10
Non-ducted, 4 tons2041.962.002.052.102.11
Non-ducted, 4.5 tons781.901.911.952.012.01
Non-ducted, 5 tons841.992.002.052.202.20

Source: AHRI Directory · as of

Top TKS models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 5 TKS cold-climate picks across sizes. 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.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2Btu/h @5°FSEER2MeetsCombosAHRI ref.Compared withScore
1TWSG-0919SR32220OTKSwith ductless indoor unit TWSG-0919SR32220I1 ton9,100 Btu/h · Non-ducted76%1.948.87,60020.5CEE 25CEE 26Xcel1217559889Non-ducted, up to 1.5 tons41.6
2TWSG-0919SR32110OTKSwith ductless indoor unit TWSG-0919SR32110I1 ton9,100 Btu/h · Non-ducted76%1.868.87,60020.5CEE 25CEE 26Xcel1217559887Non-ducted, up to 1.5 tons37.3
3TWSG-3019SR32OTKSwith ductless indoor unit TWSG-3019SR32I2.5 tons30,000 Btu/h · Non-ducted77%1.809.023,00022.0CEE 25CEE 26Xcel1218404671Non-ducted, 2.5–3 tons28.4
4TWSG-1219SR32220OTKSwith ductless indoor unit TWSG-1219SR32220I1 ton12,000 Btu/h · Non-ducted76%1.808.59,10019.0Xcel1217560255Non-ducted, up to 1.5 tons26.7
5TWSG-1819SR32OTKSwith ductless indoor unit TWSG-1819SR32I1.5 tons18,000 Btu/h · Non-ducted71%1.858.512,10020.0CEE 25CEE 26Xcel1217559890Non-ducted, up to 1.5 tons25.4

All-around best

Top 5 TKS models on the all-around score across sizes. 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.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2SEER2EER2MeetsCombosAHRI ref.Compared withScoreHeating halfCooling halfCold-climate score
1TWSG-0919SR32220OTKSwith ductless indoor unit TWSG-0919SR32220I1 ton9,100 Btu/h · Non-ducted76%1.948.820.512.5CEE 25CEE 26Xcel1217559889Non-ducted, up to 1.5 tons44.941.648.341.6
2TWSG-0919SR32110OTKSwith ductless indoor unit TWSG-0919SR32110I1 ton9,100 Btu/h · Non-ducted76%1.868.820.511.9CEE 25CEE 26Xcel1217559887Non-ducted, up to 1.5 tons37.937.338.537.3
3TWSG-3619SR32OTKSwith ductless indoor unit TWSG-3619SR32I3 tons33,600 Btu/h · Non-ducted72%1.808.521.012.0CEE 25CEE 26Xcel1218404672Non-ducted, 2.5–3 tons37.022.351.822.3
4TWSG-3019SR32OTKSwith ductless indoor unit TWSG-3019SR32I2.5 tons30,000 Btu/h · Non-ducted77%1.809.022.011.0CEE 25CEE 26Xcel1218404671Non-ducted, 2.5–3 tons35.928.443.428.4
5TWSG-1819SR32OTKSwith ductless indoor unit TWSG-1819SR32I1.5 tons18,000 Btu/h · Non-ducted71%1.858.520.012.0CEE 25CEE 26Xcel1217559890Non-ducted, up to 1.5 tons31.425.437.325.4

Best model on each rating

TKS’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FTWSG-0919SR32220O1.94Non-ducted, up to 1.5 tons49%217559889
Capacity retention at 5°FTWSG-3019SR32O77%Non-ducted, 2.5–3 tons54%218404671
HSPF2TWSG-0919SR32110O8.8Non-ducted, up to 1.5 tons23%217559887
SEER2TWSG-3019SR32O22.0Non-ducted, 2.5–3 tons57%218404671
EER2TWSG-0919SR32220O12.5Non-ducted, up to 1.5 tons56%217559889
Heating capacity at 5°FTWSG-1819SR32O12,100 Btu/hNon-ducted, up to 1.5 tons69%217559890

All 8 TKS models in Explore

TKS size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.
TKS: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct typeCold-climate pickCold-climate score, best modelAll-around bestAll-around score, best model
Non-ducted, up to 1.5 tons41.6(50 is the typical model of its size class)TWSG-0919SR32220Owith ductless indoor unit TWSG-0919SR32220I5 of 5 models qualify · AHRI 21755988944.9(50 is the typical model of its size class)TWSG-0919SR32220Owith ductless indoor unit TWSG-0919SR32220I5 of 5 models have all five ratings · AHRI 217559889
Non-ducted, 2 tons13.5(50 is the typical model of its size class)TWSG-2419SR32Owith ductless indoor unit TWSG-2419SR32I1 of 1 models qualify · AHRI 21755989124.5(50 is the typical model of its size class)TWSG-2419SR32Owith ductless indoor unit TWSG-2419SR32I1 of 1 models have all five ratings · AHRI 217559891
Non-ducted, 2.5–3 tons28.4(50 is the typical model of its size class)TWSG-3019SR32Owith ductless indoor unit TWSG-3019SR32I2 of 2 models qualify · AHRI 21840467137.0(50 is the typical model of its size class)TWSG-3619SR32Owith ductless indoor unit TWSG-3619SR32I2 of 2 models have all five ratings · AHRI 218404672

All-around board, every manufacturer

Newest TKS certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified TKS outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
TWSG-3619SR32OTKSwith ductless indoor unit TWSG-3619SR32I3 tons33,600 Btu/h · Non-ducted1.8072%8.521.0CEE 25CEE 26Xcel1218404672
TWSG-3019SR32OTKSwith ductless indoor unit TWSG-3019SR32I2.5 tons30,000 Btu/h · Non-ducted1.8077%9.022.0CEE 25CEE 26Xcel1218404671
TWSG-1219SR32220OTKSwith ductless indoor unit TWSG-1219SR32220I1 ton12,000 Btu/h · Non-ducted1.8076%8.519.0Xcel1217560255
TWSG-2419SR32OTKSwith ductless indoor unit TWSG-2419SR32I2 tons24,000 Btu/h · Non-ducted1.7570%8.519.0CEE 25CEE 26Xcel1217559891
TWSG-1819SR32OTKSwith ductless indoor unit TWSG-1819SR32I1.5 tons18,000 Btu/h · Non-ducted1.8571%8.520.0CEE 25CEE 26Xcel1217559890

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

No shared hardware found for TKS in this group.

Compare TKS

Manufacturers of a similar size, side by side.

Compare with any manufacturer

TKS includes these brand names as listed in AHRI: TKS. Standards are checked against published thresholds; program rules beyond ratings are not checked.