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Impecca heat pump efficiency: 7 outdoor models compared

Impecca has 7 heat pump outdoor models certified with this refrigerant group, in 15 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 Impecca makes. Impecca 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
7
AHRI certifications
15
Efficiency index
56%
Typical model vs same-size, same-type peers (11 models)
Meet CEE 2025
100%
7 models

How Impecca 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.
Impecca against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Impecca’s own modelsImpecca is strongest on heating capacity at 5°F (its typical model beats 70% of comparable models) and weakest on COP at 5°F (44%).
  • Impecca
  • Middle half of its models
  • Other ranked manufacturers
Impecca

Source: AHRI Directory, NEEP · as of

Average peer percentile of Impecca’s models
RatingBeats comparable modelsRankRaw median
Efficiency index11 models scored56%Not ranked—
COP at 5°F11 models scored44%Not ranked1.85
Capacity retention at 5°F11 models scored66%Not ranked76%
HSPF211 models scored55%Not ranked10.0
SEER211 models scored61%Not ranked21.0
EER211 models scored53%Not ranked12.0
Heating capacity at 5°F11 models scored70%Not ranked21,600 Btu/h

Standards met

Share of Impecca’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)100%7
CEE 2026 Tier 1 (Split ASHP)100%7
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)100%7
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.
Impecca’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
  • Impecca (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsNon-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
Ducted, up to 1.5 tons132%25%29%33%
Ducted, 2 tons146%24%45%47%
Ducted, 2.5–3 tons252%35%46%56%
Non-ducted, up to 1.5 tons258%64%55%66%
Non-ducted, 2 tons269%40%68%83%
Non-ducted, 2.5–3 tons361%51%64%61%

Every Impecca model in the market

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

Dots: 11 impecca 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 Impecca 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 Impecca 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
1ISAM-2422Impecca · M-Series2 tons23,200 Btu/h · Non-ducted90%2.1010.021,60021.0CEE 25CEE 26Xcel3215412926Non-ducted, 2 tons76.1
2ISAM-4222Impecca · M-Series3 tons36,000 Btu/h · Non-ducted81%1.9210.032,40021.0CEE 25CEE 26Xcel3215412924Non-ducted, 2.5–3 tons73.7
3ISAM-1822Impecca · M-Series1.5 tons17,000 Btu/h · Non-ducted76%2.2210.013,60021.0CEE 25CEE 26Xcel3215412925Non-ducted, up to 1.5 tons73.6
4ISAM-3622Impecca · M-Series3 tons34,000 Btu/h · Non-ducted90%1.8210.032,40021.0CEE 25CEE 26Xcel3215412923Non-ducted, 2.5–3 tons63.8
5ISAM-4222Impecca3 tons36,000 Btu/h · Ducted81%1.848.132,40016.0CEE 25CEE 26Xcel3215412930Ducted, 2.5–3 tons52.1

All-around best

Top 5 Impecca 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
1ISAM-2422Impecca · M-Series2 tons23,200 Btu/h · Non-ducted90%2.1010.021.012.5CEE 25CEE 26Xcel3215412926Non-ducted, 2 tons71.576.166.876.1
2ISAM-4222Impecca · M-Series3 tons36,000 Btu/h · Non-ducted81%1.9210.021.012.0CEE 25CEE 26Xcel3215412924Non-ducted, 2.5–3 tons70.273.766.773.7
3ISAS-2422Impecca · Lomowith ductless indoor unit ISMI-W2432 tons22,000 Btu/h · Non-ducted71%1.759.524.513.1CEE 25CEE 26Xcel1216410294Non-ducted, 2 tons65.836.095.636.0
4ISAM-3622Impecca · M-Series3 tons34,000 Btu/h · Non-ducted90%1.8210.021.012.0CEE 25CEE 26Xcel3215412923Non-ducted, 2.5–3 tons65.363.866.763.8
5ISAM-1822Impecca · M-Series1.5 tons17,000 Btu/h · Non-ducted76%2.2210.021.012.0CEE 25CEE 26Xcel3215412925Non-ducted, up to 1.5 tons58.273.642.873.6

Best model on each rating

Impecca’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FISAM-18222.22Non-ducted, up to 1.5 tons90%215412925
Capacity retention at 5°FISAM-362290%Non-ducted, 2.5–3 tons78%215412923
HSPF2ISAM-362210.0Non-ducted, 2.5–3 tons82%215412923
SEER2ISAS-242224.5Non-ducted, 2 tons98%216410294
EER2ISAS-242213.1Non-ducted, 2 tons90%216410294
Heating capacity at 5°FISAM-182213,800 Btu/hNon-ducted, up to 1.5 tons84%215412931

All 7 Impecca models in Explore

Impecca 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.
Impecca: 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 tons36.0(50 is the typical model of its size class)ISAM-18221 of 1 models qualify · AHRI 21541292731.5(50 is the typical model of its size class)ISAM-18221 of 1 models have all five ratings · AHRI 215412927
Ducted, 2 tons50.1(50 is the typical model of its size class)ISAM-24221 of 1 models qualify · AHRI 21541292845.9(50 is the typical model of its size class)ISAM-24221 of 1 models have all five ratings · AHRI 215412928
Ducted, 2.5–3 tons52.1(50 is the typical model of its size class)ISAM-42222 of 2 models qualify · AHRI 21541293051.8(50 is the typical model of its size class)ISAM-42222 of 2 models have all five ratings · AHRI 215412930
Non-ducted, up to 1.5 tons73.6(50 is the typical model of its size class)ISAM-18222 of 2 models qualify · AHRI 21541292558.2(50 is the typical model of its size class)ISAM-18222 of 2 models have all five ratings · AHRI 215412925
Non-ducted, 2 tons76.1(50 is the typical model of its size class)ISAM-24222 of 2 models qualify · AHRI 21541292671.5(50 is the typical model of its size class)ISAM-24222 of 2 models have all five ratings · AHRI 215412926
Non-ducted, 2.5–3 tons73.7(50 is the typical model of its size class)ISAM-42223 of 3 models qualify · AHRI 21541292470.2(50 is the typical model of its size class)ISAM-42223 of 3 models have all five ratings · AHRI 215412924

All-around board, every manufacturer

Newest Impecca certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified Impecca outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
ISAS-2422Impecca · Lomowith ductless indoor unit ISMI-W2432 tons22,000 Btu/h · Non-ducted1.7571%9.524.5CEE 25CEE 26Xcel1216410294
ISAS-3622Impeccawith ductless indoor unit ISMI-W3633 tons33,600 Btu/h · Non-ducted1.8571%8.520.0CEE 25CEE 26Xcel1216410293
ISAS-1225BImpecca · Lomowith ductless indoor unit ISMI-W1231 ton12,000 Btu/h · Non-ducted1.8575%9.024.0CEE 25CEE 26Xcel1216410292
ISAM-4222Impecca3 tons36,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)1.8081%9.018.5CEE 25CEE 26Xcel3215412934
ISAM-3622Impecca3 tons34,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)1.8083%9.018.5CEE 25CEE 26Xcel3215412933

Shares hardware with

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

No shared hardware found for Impecca in this group.

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Manufacturers of a similar size, side by side.

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