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Bestcold heat pump efficiency: 7 outdoor models compared

Bestcold has 7 heat pump outdoor models certified with this refrigerant group, in 7 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 Bestcold makes. Bestcold 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
7
AHRI certifications
7
Efficiency index
22%
Typical model vs same-size, same-type peers (7 models)
Meet CEE 2025
71.4%
5 models

How Bestcold 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.
Bestcold against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Bestcold’s own modelsBestcold is strongest on heating capacity at 5°F (its typical model beats 32% of comparable models) and weakest on EER2 (16%).
  • Bestcold
  • Middle half of its models
  • Other ranked manufacturers
Bestcold

Source: AHRI Directory, NEEP · as of

Average peer percentile of Bestcold’s models
RatingBeats comparable modelsRankRaw median
Efficiency index7 models scored22%Not ranked—
COP at 5°F7 models scored19%Not ranked1.80
Capacity retention at 5°F7 models scored30%Not ranked70%
HSPF27 models scored19%Not ranked8.5
SEER27 models scored27%Not ranked19.0
EER27 models scored16%Not ranked10.0
Heating capacity at 5°F7 models scored32%Not ranked8,600 Btu/h

Standards met

Share of Bestcold’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)71.4%5
CEE 2026 Tier 1 (Split ASHP)57.1%4
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)57.1%4
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.
Bestcold’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
  • Bestcold (median, middle 50%, 10th–90th)
  • All models of the group
Non-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 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 tons521%19%16%23%
Non-ducted, 2 tons125%26%22%37%
Non-ducted, 2.5–3 tons123%15%26%36%

Every Bestcold model in the market

Bestcold’s 7 models with a known size and duct type, over the shape of the whole catalog.
Bestcold models by size and ratingColoured: Bestcold · grey shapes: all 11,475 models · lines: catalog medians by size
  • Bestcold models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 7 bestcold models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 11,475 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 tons1751.701.851.902.102.26
Ducted, 1 ton3401.851.902.002.402.65
Ducted, 1.5 tons7891.751.852.002.202.55
Ducted, 2 tons7821.731.802.002.102.33
Ducted, 2.5 tons7351.711.801.902.092.48
Ducted, 3 tons6521.681.701.902.062.36
Ducted, 3.5 tons6411.611.801.952.202.50
Ducted, 4 tons3671.701.801.912.022.52
Ducted, 4.5 tons5441.701.801.912.082.34
Ducted, 5 tons251.801.801.901.902.15
Non-ducted, 0.5 tons7171.751.811.972.102.19
Non-ducted, 1 ton1,0641.751.801.902.072.25
Non-ducted, 1.5 tons8861.801.801.872.072.21
Non-ducted, 2 tons5641.801.801.832.042.21
Non-ducted, 2.5 tons2751.801.811.841.862.03
Non-ducted, 3 tons5021.801.801.902.002.09
Non-ducted, 3.5 tons701.821.831.902.002.28
Non-ducted, 4 tons2631.801.801.982.002.10
Non-ducted, 4.5 tons1031.771.771.801.972.02
Non-ducted, 5 tons291.982.002.102.302.47

Source: AHRI Directory · as of

Top Bestcold 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 3 Bestcold 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
1MYTW-12HPAC1/OBestcoldwith ductless indoor unit MYTW-12HPAC1/IAlso listed as MYTW-12HPAC2/O1 ton12,000 Btu/h · Non-ducted70%1.808.58,60019.0CEE 25CEE 26Xcel1214844424Non-ducted, up to 1.5 tons28.4
2MYTW-09HPAC2/OBestcoldwith ductless indoor unit MYTW-09HPAC2/I1 ton9,000 Btu/h · Non-ducted70%1.808.57,00019.0CEE 25CEE 26Xcel1214844425Non-ducted, up to 1.5 tons26.2
3MYTW-09HPAC1/OBestcoldwith ductless indoor unit MYTW-09HPAC1/I1 ton9,000 Btu/h · Non-ducted70%1.758.57,00019.0CEE 25CEE 26Xcel1214844423Non-ducted, up to 1.5 tons20.8

All-around best

Top 5 Bestcold 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
1MYTW-24HPAC2/OBestcoldwith ductless indoor unit MYTW-24HPAC2/I2 tons24,000 Btu/h · Non-ducted61%1.808.519.010.0CEE 251214844428Non-ducted, 2 tons24.819.130.5Not a pick
2MYTW-12HPAC1/OBestcoldwith ductless indoor unit MYTW-12HPAC1/IAlso listed as MYTW-12HPAC2/O1 ton12,000 Btu/h · Non-ducted70%1.808.519.010.0CEE 25CEE 26Xcel1214844424Non-ducted, up to 1.5 tons23.628.418.928.4
3MYTW-36HPAC2/OBestcoldwith ductless indoor unit MYTW-36HPAC2/I3 tons36,000 Btu/h · Non-ducted58%1.808.519.09.0None1214844429Non-ducted, 2.5–3 tons23.417.928.8Not a pick
4MYTW-09HPAC2/OBestcoldwith ductless indoor unit MYTW-09HPAC2/I1 ton9,000 Btu/h · Non-ducted70%1.808.519.010.0CEE 25CEE 26Xcel1214844425Non-ducted, up to 1.5 tons22.526.218.926.2
5MYTW-09HPAC1/OBestcoldwith ductless indoor unit MYTW-09HPAC1/I1 ton9,000 Btu/h · Non-ducted70%1.758.519.010.0CEE 25CEE 26Xcel1214844423Non-ducted, up to 1.5 tons19.920.818.920.8

Best model on each rating

Bestcold’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FMYTW-24HPAC2/O1.80Non-ducted, 2 tons26%214844428
Capacity retention at 5°FMYTW-12HPAC1/OAlso listed as MYTW-12HPAC2/O70%Non-ducted, up to 1.5 tons46%214844424
HSPF2MYTW-36HPAC2/O8.5Non-ducted, 2.5–3 tons25%214844429
SEER2MYTW-36HPAC2/O19.0Non-ducted, 2.5–3 tons35%214844429
EER2MYTW-24HPAC2/O10.0Non-ducted, 2 tons25%214844428
Heating capacity at 5°FMYTW-18HPAC2/O11,600 Btu/hNon-ducted, up to 1.5 tons61%214844427

All 7 Bestcold models in Explore

Bestcold 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.
Bestcold: 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 tons28.4(50 is the typical model of its size class)MYTW-12HPAC1/Owith ductless indoor unit MYTW-12HPAC1/IAlso listed as MYTW-12HPAC2/O4 of 5 models qualify · AHRI 21484442423.6(50 is the typical model of its size class)MYTW-12HPAC1/Owith ductless indoor unit MYTW-12HPAC1/IAlso listed as MYTW-12HPAC2/O5 of 5 models have all five ratings · AHRI 214844424
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)24.8(50 is the typical model of its size class)MYTW-24HPAC2/Owith ductless indoor unit MYTW-24HPAC2/I1 of 1 models have all five ratings · AHRI 214844428
Non-ducted, 2.5–3 tonsNone on this board (0 of 1 models qualify)23.4(50 is the typical model of its size class)MYTW-36HPAC2/Owith ductless indoor unit MYTW-36HPAC2/I1 of 1 models have all five ratings · AHRI 214844429

All-around board, every manufacturer

Newest Bestcold certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified Bestcold outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
MYTW-36HPAC2/OBestcoldwith ductless indoor unit MYTW-36HPAC2/I3 tons36,000 Btu/h · Non-ducted1.8058%8.519.0None1214844429
MYTW-24HPAC2/OBestcoldwith ductless indoor unit MYTW-24HPAC2/I2 tons24,000 Btu/h · Non-ducted1.8061%8.519.0CEE 251214844428
MYTW-18HPAC2/OBestcoldwith ductless indoor unit MYTW-18HPAC2/I1.5 tons18,000 Btu/h · Non-ducted1.8059%8.519.0None1214844427
MYTW-12HPAC2/OBestcoldwith ductless indoor unit MYTW-12HPAC2/I1 ton12,000 Btu/h · Non-ducted1.8070%8.519.0CEE 25CEE 26Xcel1214844426
MYTW-09HPAC2/OBestcoldwith ductless indoor unit MYTW-09HPAC2/I1 ton9,000 Btu/h · Non-ducted1.8070%8.519.0CEE 25CEE 26Xcel1214844425

Shares hardware with

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

No shared hardware found for Bestcold in this group.

Compare Bestcold

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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