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BOSTON AC heat pump efficiency: 6 outdoor models compared

BOSTON AC has 6 heat pump outdoor models certified with this refrigerant group, in 6 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 BOSTON AC makes. BOSTON AC 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
6
AHRI certifications
6
Efficiency index
56%
Typical model vs same-size, same-type peers (6 models)
Meet CEE 2025
100%
6 models

How BOSTON AC 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.
BOSTON AC against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of BOSTON AC’s own modelsBOSTON AC is strongest on SEER2 (its typical model beats 65% of comparable models) and weakest on heating capacity at 5°F (43%).
  • BOSTON AC
  • Middle half of its models
  • Other ranked manufacturers
BOSTON AC

Source: AHRI Directory, NEEP · as of

Average peer percentile of BOSTON AC’s models
RatingBeats comparable modelsRankRaw median
Efficiency index6 models scored56%Not ranked—
COP at 5°F6 models scored55%Not ranked1.99
Capacity retention at 5°F6 models scored52%Not ranked73%
HSPF26 models scored45%Not ranked9.0
SEER26 models scored65%Not ranked22.0
EER26 models scored59%Not ranked12.5
Heating capacity at 5°F6 models scored43%Not ranked9,070 Btu/h

Standards met

Share of BOSTON AC’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)100%6
CEE 2026 Tier 1 (Split ASHP)100%6
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)83.3%5
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.
BOSTON AC’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
  • BOSTON AC (median, middle 50%, 10th–90th)
  • All models of the group
Non-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 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 tons558%61%44%68%
Non-ducted, 2 tons147%26%50%47%

Every BOSTON AC model in the market

BOSTON AC’s 6 models with a known size and duct type, over the shape of the whole catalog.
BOSTON AC models by size and ratingColoured: BOSTON AC · grey shapes: all 11,475 models · lines: catalog medians by size
  • BOSTON AC models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 6 boston ac 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 BOSTON AC 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 BOSTON AC 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
1BA12HCT23X2OBOSTON ACwith ductless indoor unit BA12HCT23X2I1 ton12,000 Btu/h · Non-ducted76%2.189.59,17023.0CEE 25CEE 26Xcel1214720280Non-ducted, up to 1.5 tons68.8
2BA12HCT22X1OBOSTON ACwith ductless indoor unit BA12HCT22X1I1 ton12,000 Btu/h · Non-ducted75%2.199.08,97022.0CEE 25CEE 26Xcel1214720279Non-ducted, up to 1.5 tons62.5
3BA18HCT22X2OBOSTON ACwith ductless indoor unit BA18HCT22X2I1.5 tons18,000 Btu/h · Non-ducted70%2.219.012,60022.0CEE 25CEE 26Xcel1214720281Non-ducted, up to 1.5 tons56.5
4BA09HCT23X1OBOSTON ACwith ductless indoor unit BA09HCT23X1I1 ton9,000 Btu/h · Non-ducted74%1.809.07,00023.0CEE 25CEE 26Xcel1214796635Non-ducted, up to 1.5 tons39.9
5BA09HCT23X2OBOSTON ACwith ductless indoor unit BA09HCT23X2I1 ton12,000 Btu/h · Non-ducted73%1.809.08,70022.0CEE 25CEE 26Xcel1214796636Non-ducted, up to 1.5 tons39.1

All-around best

Top 5 BOSTON AC 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
1BA12HCT23X2OBOSTON ACwith ductless indoor unit BA12HCT23X2I1 ton12,000 Btu/h · Non-ducted76%2.189.523.013.0CEE 25CEE 26Xcel1214720280Non-ducted, up to 1.5 tons70.868.872.968.8
2BA18HCT22X2OBOSTON ACwith ductless indoor unit BA18HCT22X2I1.5 tons18,000 Btu/h · Non-ducted70%2.219.022.013.0CEE 25CEE 26Xcel1214720281Non-ducted, up to 1.5 tons61.756.566.856.5
3BA12HCT22X1OBOSTON ACwith ductless indoor unit BA12HCT22X1I1 ton12,000 Btu/h · Non-ducted75%2.199.022.012.5CEE 25CEE 26Xcel1214720279Non-ducted, up to 1.5 tons59.662.556.762.5
4BA09HCT23X1OBOSTON ACwith ductless indoor unit BA09HCT23X1I1 ton9,000 Btu/h · Non-ducted74%1.809.023.012.5CEE 25CEE 26Xcel1214796635Non-ducted, up to 1.5 tons51.339.962.739.9
5BA09HCT23X2OBOSTON ACwith ductless indoor unit BA09HCT23X2I1 ton12,000 Btu/h · Non-ducted73%1.809.022.012.5CEE 25CEE 26Xcel1214796636Non-ducted, up to 1.5 tons47.939.156.739.1

Best model on each rating

BOSTON AC’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FBA18HCT22X2O2.21Non-ducted, up to 1.5 tons89%214720281
Capacity retention at 5°FBA12HCT23X2O76%Non-ducted, up to 1.5 tons61%214720280
HSPF2BA12HCT23X2O9.5Non-ducted, up to 1.5 tons57%214720280
SEER2BA12HCT23X2O23.0Non-ducted, up to 1.5 tons73%214720280
EER2BA12HCT23X2O13.0Non-ducted, up to 1.5 tons68%214720280
Heating capacity at 5°FBA18HCT22X2O12,600 Btu/hNon-ducted, up to 1.5 tons73%214720281

All 6 BOSTON AC models in Explore

BOSTON AC 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.
BOSTON AC: 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 tons68.8(50 is the typical model of its size class)BA12HCT23X2Owith ductless indoor unit BA12HCT23X2I5 of 5 models qualify · AHRI 21472028070.8(50 is the typical model of its size class)BA12HCT23X2Owith ductless indoor unit BA12HCT23X2I5 of 5 models have all five ratings · AHRI 214720280
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)46.5(50 is the typical model of its size class)BA24HCT20X2Owith ductless indoor unit BA24HCT20X2I1 of 1 models have all five ratings · AHRI 214796637

All-around board, every manufacturer

Newest BOSTON AC certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified BOSTON AC outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
BA24HCT20X2OBOSTON ACwith ductless indoor unit BA24HCT20X2I2 tons23,000 Btu/h · Non-ducted1.8067%9.020.0CEE 25CEE 261214796637
BA09HCT23X2OBOSTON ACwith ductless indoor unit BA09HCT23X2I1 ton12,000 Btu/h · Non-ducted1.8073%9.022.0CEE 25CEE 26Xcel1214796636
BA09HCT23X1OBOSTON ACwith ductless indoor unit BA09HCT23X1I1 ton9,000 Btu/h · Non-ducted1.8074%9.023.0CEE 25CEE 26Xcel1214796635
BA18HCT22X2OBOSTON ACwith ductless indoor unit BA18HCT22X2I1.5 tons18,000 Btu/h · Non-ducted2.2170%9.022.0CEE 25CEE 26Xcel1214720281
BA12HCT23X2OBOSTON ACwith ductless indoor unit BA12HCT23X2I1 ton12,000 Btu/h · Non-ducted2.1876%9.523.0CEE 25CEE 26Xcel1214720280

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