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Wells heat pump efficiency: 37 outdoor models compared

Wells has 37 heat pump outdoor models certified with this refrigerant group, in 121 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 Wells makes. Wells has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

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ManufacturerData as of updated · sources

Outdoor models
37
AHRI certifications
121
Efficiency index
63%
Typical model vs same-size, same-type peers (57 models)
Meet CEE 2025
86.5%
32 models

How Wells 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.
Wells against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Wells’s own modelsWells is strongest on HSPF2 (its typical model beats 74% of comparable models) and weakest on EER2 (59%).
  • Wells
  • Middle half of its models
  • Other ranked manufacturers
Wells

Source: AHRI Directory, NEEP · as of

Average peer percentile of Wells’s models
RatingBeats comparable modelsRankRaw median
Efficiency index57 models scored63%Not ranked—
COP at 5°F57 models scored64%Not ranked2.10
Capacity retention at 5°F57 models scored61%Not ranked75%
HSPF257 models scored74%Not ranked10.0
SEER257 models scored62%Not ranked19.4
EER257 models scored59%Not ranked12.0
Heating capacity at 5°F57 models scored62%Not ranked19,000 Btu/h

Standards met

Share of Wells’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)86.5%32
CEE 2026 Tier 1 (Split ASHP)83.8%31
CEE Advanced Tier (Split ASHP)2.7%1
Xcel Energy Colorado cold-climate ASHP (2025)81.1%30
DOE Cold Climate Heat Pump Challenge2.7%1
ENERGY STAR Cold Climate83.8%31

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
Wells’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
  • Wells (median, middle 50%, 10th–90th)
  • 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 modelsNon-ducted, 5 tons and up2.0585 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, up to 1.5 tons980%77%89%81%
Ducted, 2 tons573%61%80%80%
Ducted, 2.5–3 tons767%51%82%68%
Ducted, 3.5–4.5 tons763%50%78%71%
Ducted, 5 tons and up163%66%82%89%
Non-ducted, up to 1.5 tons1658%76%68%52%
Non-ducted, 2 tons453%73%58%47%
Non-ducted, 2.5–3 tons454%31%70%47%
Non-ducted, 3.5–4.5 tons357%62%59%52%
Non-ducted, 5 tons and up127%42%18%16%

Every Wells model in the market

Wells’s 57 models with a known size and duct type, over the shape of the whole catalog.
Wells models by size and ratingColoured: Wells · grey shapes: all 14,508 models · lines: catalog medians by size
  • Wells models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 57 wells 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 Wells 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 Wells 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
1WOS-06PRE/230Wells · WOS Serieswith ductless indoor unit WI1C-06MOC/2300.5 tons6,500 Btu/h · Non-ducted109%2.4012.08,10022.0CEE 25CEE 26CEE AdvXcelDOEES CC3215864073Non-ducted, up to 1.5 tons94.4
2WOS-06PRE/230Wells · WOS Serieswith ducted air handler WIDL-06MOC/2300.5 tons6,500 Btu/h · Ducted98%2.4113.87,80021.4CEE 25CEE 26XcelES CC3215864077Ducted, up to 1.5 tons93.5
3WOS-09QUA/230Wells · WOS Serieswith ductless indoor unit WICS-09MOC/2301 ton9,000 Btu/h · Non-ducted96%2.2713.98,60026.0CEE 25CEE 26XcelES CC6215864064Non-ducted, up to 1.5 tons89.5
4WOS-24PRE/230Wells · WOS Serieswith ductless indoor unit WI4C-24MOC/2302 tons23,400 Btu/h · Non-ducted95%2.2311.623,80020.7CEE 25CEE 26XcelES CC5215864072Non-ducted, 2 tons89.4
5WOS-24PRE/230Wells · WOS Serieswith ducted air handler WIDH-24MOC/2302 tons24,000 Btu/h · Ducted92%2.1811.724,00019.0CEE 25CEE 26XcelES CC5215864084Ducted, 2 tons85.7

All-around best

Top 5 Wells 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
1WOS-06PRE/230Wells · WOS Serieswith ducted air handler WIDL-06MOC/2300.5 tons6,500 Btu/h · Ducted98%2.4113.821.414.4CEE 25CEE 26XcelES CC3215864077Ducted, up to 1.5 tons95.093.596.593.5
2WOS-06PRE/230Wells · WOS Serieswith ductless indoor unit WIHW-06MOC/2300.5 tons6,000 Btu/h · Non-ducted107%2.2914.625.316.0CEE 25CEE 26CEE AdvXcelDOEES CC3215864044Non-ducted, up to 1.5 tons93.893.893.994.4
3WOS-09QUA/230Wells · WOS Serieswith ductless indoor unit WICS-09MOC/2301 ton9,000 Btu/h · Non-ducted96%2.2713.926.016.2CEE 25CEE 26XcelES CC6215864064Non-ducted, up to 1.5 tons92.689.595.789.5
4WOS-09PRE/230Wells · WOS Serieswith ducted air handler WIDL-09MOC/2301 ton9,000 Btu/h · Ducted112%1.8912.521.413.4CEE 25CEE 26XcelES CC6215864078Ducted, up to 1.5 tons86.780.093.580.0
5WOM-48RH6/230Wells · WOM Series4 tons45,000 Btu/h · Ducted81%2.1010.620.412.0CEE 25CEE 26XcelES CC3215864100Ducted, 3.5–4.5 tons85.177.992.377.9

Best model on each rating

Wells’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FWOS-12QUA/2302.51Non-ducted, up to 1.5 tons99%215864065
Capacity retention at 5°FWOS-09PRE/230126%Non-ducted, up to 1.5 tons98%215864085
HSPF2WOM-48HH6/23011.0Ducted, 3.5–4.5 tons99%215864115
SEER2WOM-48RH6/23020.4Ducted, 3.5–4.5 tons96%215864100
EER2WOS-06PRE/23014.4Ducted, up to 1.5 tons99%215864077
Heating capacity at 5°FWDHP-36HH39,000 Btu/hDucted, 2.5–3 tons97%215864029

All 37 Wells models in Explore

Wells 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.
Wells: 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
Ducted, up to 1.5 tons93.5(50 is the typical model of its size class)WOS-06PRE/230with ducted air handler WIDL-06MOC/2309 of 9 models qualify · AHRI 21586407795.0(50 is the typical model of its size class)WOS-06PRE/230with ducted air handler WIDL-06MOC/2309 of 9 models have all five ratings · AHRI 215864077
Ducted, 2 tons85.7(50 is the typical model of its size class)WOS-24PRE/230with ducted air handler WIDH-24MOC/2305 of 5 models qualify · AHRI 21586408479.6(50 is the typical model of its size class)WDHP-2436T-Gwith ducted air handler WDAH-24MOC-G5 of 5 models have all five ratings · AHRI 217048501
Ducted, 2.5–3 tons82.5(50 is the typical model of its size class)WOM-36HH5/2307 of 7 models qualify · AHRI 21586411283.6(50 is the typical model of its size class)WOM-36HH5/2307 of 7 models have all five ratings · AHRI 215864112
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)WOM-48HH6/2307 of 7 models qualify · AHRI 21586411585.1(50 is the typical model of its size class)WOM-48RH6/2307 of 7 models have all five ratings · AHRI 215864100
Ducted, 5 tons and upNone on this board (0 of 1 models qualify)62.5(50 is the typical model of its size class)WOM-60RH6/2301 of 1 models have all five ratings · AHRI 215864103
Non-ducted, up to 1.5 tons94.4(50 is the typical model of its size class)WOS-06PRE/230with ductless indoor unit WI1C-06MOC/23011 of 16 models qualify · AHRI 21586407393.8(50 is the typical model of its size class)WOS-06PRE/230with ductless indoor unit WIHW-06MOC/23016 of 16 models have all five ratings · AHRI 215864044
Non-ducted, 2 tons89.4(50 is the typical model of its size class)WOS-24PRE/230with ductless indoor unit WI4C-24MOC/2304 of 4 models qualify · AHRI 21586407274.3(50 is the typical model of its size class)WOS-24QUA/230with ductless indoor unit WIHW-24MOC/2304 of 4 models have all five ratings · AHRI 215864043
Non-ducted, 2.5–3 tons72.6(50 is the typical model of its size class)WOM-36HH5/2304 of 4 models qualify · AHRI 21586411366.3(50 is the typical model of its size class)WOM-36HH5/2304 of 4 models have all five ratings · AHRI 215864111
Non-ducted, 3.5–4.5 tons69.9(50 is the typical model of its size class)WOM-60HH6/2303 of 3 models qualify · AHRI 21586411962.6(50 is the typical model of its size class)WOM-60HH6/2303 of 3 models have all five ratings · AHRI 215864117
Non-ducted, 5 tons and upNone on this board (0 of 1 models qualify)32.5(50 is the typical model of its size class)WOM-60RH6/2301 of 1 models have all five ratings · AHRI 215864102

All-around board, every manufacturer

Newest Wells certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified Wells outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
WDHP-24HHWellswith ducted air handler H,A,DG21*30+TXV+TD2 tons23,000 Btu/h · Ducted1.7086%8.815.2CEE 25CEE 26XcelES CC5217375110
WDHP-30HHWellswith ducted air handler H,A,DG7J*36+TXV+TD2.5 tons28,400 Btu/h · Ducted1.8088%9.315.2CEE 25CEE 26XcelES CC6217375037
WDHP-60HHWellswith ducted air handler H,A,DG35*48+TXV+TD4 tons45,500 Btu/h · Ducted1.8071%7.915.0CEE 25CEE 26XcelES CC4217375035
WDHP-36HHWellswith ducted air handler H,A,DG7J*36+TXV+TD3 tons35,200 Btu/h · Ducted1.8699%9.115.2CEE 25CEE 26XcelES CC5217375034
WDHP-4860T-GWELLS · Ducted Central Airwith ducted air handler WDAH-60MOC-G4.5 tons55,500 Btu/h · Ducted2.1075%8.617.0CEE 25CEE 26XcelES CC2217048504

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