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J-KU heat pump efficiency: 10 outdoor models compared

J-KU has 10 heat pump outdoor models certified with this refrigerant group, in 10 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 J-KU makes. J-KU 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
10
AHRI certifications
10
Efficiency index
62%
Typical model vs same-size, same-type peers (10 models)
Meet CEE 2025
100%
10 models

How J-KU 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.
J-KU against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of J-KU’s own modelsJ-KU is strongest on EER2 (its typical model beats 71% of comparable models) and weakest on HSPF2 (48%).
  • J-KU
  • Middle half of its models
  • Other ranked manufacturers
J-KU

Source: AHRI Directory, NEEP · as of

Average peer percentile of J-KU’s models
RatingBeats comparable modelsRankRaw median
Efficiency index10 models scored62%Not ranked—
COP at 5°F10 models scored49%Not ranked1.84
Capacity retention at 5°F10 models scored66%Not ranked87%
HSPF210 models scored48%Not ranked9.0
SEER210 models scored67%Not ranked21.5
EER210 models scored71%Not ranked12.8
Heating capacity at 5°F10 models scored61%Not ranked15,015 Btu/h

Standards met

Share of J-KU’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)100%10
CEE 2026 Tier 1 (Split ASHP)100%10
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)90%9
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate80%8

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
J-KU’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
  • J-KU (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 modelsNon-ducted, 3.5–4.5 tons1.97438 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 tons662%46%54%67%
Non-ducted, 2 tons263%65%46%75%
Non-ducted, 2.5–3 tons170%45%48%65%
Non-ducted, 3.5–4.5 tons145%41%14%45%

Every J-KU model in the market

J-KU’s 10 models with a known size and duct type, over the shape of the whole catalog.
J-KU models by size and ratingColoured: J-KU · grey shapes: all 11,475 models · lines: catalog medians by size
  • J-KU models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 10 j-ku 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 J-KU 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 J-KU 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
1JKS09HP230V1XCJ-KU · ULTRAwith ductless indoor unit JKS09HP230V1XE1 ton9,000 Btu/h · Non-ducted88%2.3610.59,25027.5CEE 25CEE 26XcelES CC1211583739Non-ducted, up to 1.5 tons83.4
2JKS12HP230V1XCJ-KU · ULTRAwith ductless indoor unit JKS12HP230V1XE1 ton12,000 Btu/h · Non-ducted93%2.419.812,03023.5CEE 25CEE 26XcelES CC1211583740Non-ducted, up to 1.5 tons80.0
3JKS-24H2HP-M3OJ-KU · Hi MULTI Xtreme2 tons24,000 Btu/h · Non-ducted100%1.849.124,00022.0CEE 25CEE 26XcelES CC1213286754Non-ducted, 2 tons64.4
4JKS-36H2HP-M4OJ-KU · Hi MULTI Xtreme2.5 tons32,000 Btu/h · Non-ducted113%1.849.036,00021.0CEE 25CEE 26XcelES CC1213286756Non-ducted, 2.5–3 tons64.0
5JKS-18H2HP-M2OJ-KU · Hi MULTI Xtreme1.5 tons18,000 Btu/h · Non-ducted100%1.849.518,00021.0CEE 25CEE 26XcelES CC1213286753Non-ducted, up to 1.5 tons60.5

All-around best

Top 5 J-KU 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
1JKS09HP230V1XCJ-KU · ULTRAwith ductless indoor unit JKS09HP230V1XE1 ton9,000 Btu/h · Non-ducted88%2.3610.527.515.5CEE 25CEE 26XcelES CC1211583739Non-ducted, up to 1.5 tons89.283.495.183.4
2JKS12HP230V1XCJ-KU · ULTRAwith ductless indoor unit JKS12HP230V1XE1 ton12,000 Btu/h · Non-ducted93%2.419.823.515.4CEE 25CEE 26XcelES CC1211583740Non-ducted, up to 1.5 tons83.480.086.780.0
3JKS-24H2HP-M3OJ-KU · Hi MULTI Xtreme2 tons24,000 Btu/h · Non-ducted100%1.849.122.012.5CEE 25CEE 26XcelES CC1213286754Non-ducted, 2 tons71.364.478.264.4
4JKS-36H2HP-M4OJ-KU · Hi MULTI Xtreme2.5 tons32,000 Btu/h · Non-ducted113%1.849.021.012.5CEE 25CEE 26XcelES CC1213286756Non-ducted, 2.5–3 tons69.564.075.064.0
5JKS24HP230V1XCJ-KU · ULTRAwith ductless indoor unit JKS24HP230V1XE2 tons23,000 Btu/h · Non-ducted79%2.138.620.512.2CEE 25CEE 26XcelES CC1213088032Non-ducted, 2 tons55.557.853.157.8

Best model on each rating

J-KU’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FJKS12HP230V1XC2.41Non-ducted, up to 1.5 tons97%211583740
Capacity retention at 5°FJKS-36H2HP-M4O113%Non-ducted, 2.5–3 tons99%213286756
HSPF2JKS09HP230V1XC10.5Non-ducted, up to 1.5 tons79%211583739
SEER2JKS09HP230V1XC27.5Non-ducted, up to 1.5 tons96%211583739
EER2JKS09HP230V1XC15.5Non-ducted, up to 1.5 tons93%211583739
Heating capacity at 5°FJKS-18H2HP-M2O18,000 Btu/hNon-ducted, up to 1.5 tons92%213286753

All 10 J-KU models in Explore

J-KU 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.
J-KU: 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 tons83.4(50 is the typical model of its size class)JKS09HP230V1XCwith ductless indoor unit JKS09HP230V1XE5 of 6 models qualify · AHRI 21158373989.2(50 is the typical model of its size class)JKS09HP230V1XCwith ductless indoor unit JKS09HP230V1XE6 of 6 models have all five ratings · AHRI 211583739
Non-ducted, 2 tons64.4(50 is the typical model of its size class)JKS-24H2HP-M3O2 of 2 models qualify · AHRI 21328675471.3(50 is the typical model of its size class)JKS-24H2HP-M3O2 of 2 models have all five ratings · AHRI 213286754
Non-ducted, 2.5–3 tons64.0(50 is the typical model of its size class)JKS-36H2HP-M4O1 of 1 models qualify · AHRI 21328675669.5(50 is the typical model of its size class)JKS-36H2HP-M4O1 of 1 models have all five ratings · AHRI 213286756
Non-ducted, 3.5–4.5 tons41.8(50 is the typical model of its size class)JKS-42H2HP-M5O1 of 1 models qualify · AHRI 21328675544.5(50 is the typical model of its size class)JKS-42H2HP-M5O1 of 1 models have all five ratings · AHRI 213286755

All-around board, every manufacturer

Newest J-KU certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified J-KU outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
JKS-36H2HP-M4OJ-KU · Hi MULTI Xtreme2.5 tons32,000 Btu/h · Non-ducted1.84113%9.021.0CEE 25CEE 26XcelES CC1213286756
JKS-42H2HP-M5OJ-KU3.5 tons42,000 Btu/h · Non-ducted1.8486%9.020.0CEE 25CEE 26Xcel1213286755
JKS-24H2HP-M3OJ-KU · Hi MULTI Xtreme2 tons24,000 Btu/h · Non-ducted1.84100%9.122.0CEE 25CEE 26XcelES CC1213286754
JKS-18H2HP-M2OJ-KU · Hi MULTI Xtreme1.5 tons18,000 Btu/h · Non-ducted1.84100%9.521.0CEE 25CEE 26XcelES CC1213286753
JKS-18H2HP-ES(O)J-KU · ULTRAwith ductless indoor unit JKS-18H2HP-ES(I)1.5 tons18,000 Btu/h · Non-ducted1.8066%8.622.5CEE 25CEE 26ES CC1213265624

Shares hardware with

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

No shared hardware found for J-KU in this group.

Compare J-KU

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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