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DIYCOOL heat pump efficiency: 24 outdoor models compared

DIYCOOL has 24 heat pump outdoor models certified with this refrigerant group, in 30 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 DIYCOOL makes. DIYCOOL 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
24
AHRI certifications
30
Efficiency index
54%
Typical model vs same-size, same-type peers (27 models)
Meet CEE 2025
79.2%
19 models

How DIYCOOL 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.
DIYCOOL against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of DIYCOOL’s own modelsDIYCOOL is strongest on HSPF2 (its typical model beats 63% of comparable models) and weakest on EER2 (47%).
  • DIYCOOL
  • Middle half of its models
  • Other ranked manufacturers
DIYCOOL

Source: AHRI Directory, NEEP · as of

Average peer percentile of DIYCOOL’s models
RatingBeats comparable modelsRankRaw median
Efficiency index27 models scored54%Not ranked—
COP at 5°F27 models scored53%Not ranked2.00
Capacity retention at 5°F27 models scored51%Not ranked74%
HSPF227 models scored63%Not ranked9.6
SEER227 models scored60%Not ranked18.7
EER227 models scored47%Not ranked11.5
Heating capacity at 5°F27 models scored60%Not ranked23,500 Btu/h

Standards met

Share of DIYCOOL’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)79.2%19
CEE 2026 Tier 1 (Split ASHP)79.2%19
CEE Advanced Tier (Split ASHP)4.2%1
Xcel Energy Colorado cold-climate ASHP (2025)70.8%17
DOE Cold Climate Heat Pump Challenge4.2%1
ENERGY STAR Cold Climate75%18

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
DIYCOOL’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
  • DIYCOOL (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 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 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, 2 tons464%46%80%67%
Ducted, 2.5–3 tons462%51%80%67%
Ducted, 3.5–4.5 tons761%42%77%67%
Non-ducted, up to 1.5 tons648%73%53%51%
Non-ducted, 2 tons344%61%31%51%
Non-ducted, 2.5–3 tons232%41%30%42%
Non-ducted, 3.5–4.5 tons153%37%40%68%

Every DIYCOOL model in the market

DIYCOOL’s 27 models with a known size and duct type, over the shape of the whole catalog.
DIYCOOL models by size and ratingColoured: DIYCOOL · grey shapes: all 14,508 models · lines: catalog medians by size
  • DIYCOOL models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 27 diycool 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 DIYCOOL 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 DIYCOOL 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
1ACIQ-60-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-60-AH324.5 tons53,000 Btu/h · Ducted100%2.1010.554,00018.5CEE 25CEE 26CEE AdvXcelDOEES CC1215387245Ducted, 3.5–4.5 tons85.1
2ACIQ-48-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-48-AH324 tons48,000 Btu/h · Ducted100%2.0010.048,00019.0CEE 25CEE 26XcelES CC1215387244Ducted, 3.5–4.5 tons78.9
3ACIQ-36-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-36-AH323 tons34,000 Btu/h · Ducted100%2.0010.034,00018.2CEE 25CEE 26XcelES CC1215387243Ducted, 2.5–3 tons76.9
4ACIQ-24-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-24-AH322 tons24,000 Btu/h · Ducted100%2.0010.025,00018.0CEE 25CEE 26XcelES CC1215387242Ducted, 2 tons76.2
5EZ-18ZPL-HP230BDIYCOOL · EZ Serieswith ductless indoor unit EZ-18W-MB1.5 tons18,000 Btu/h · Non-ducted71%2.4411.512,80022.5CEE 25CEE 26XcelES CC1216980898Non-ducted, up to 1.5 tons73.1

All-around best

Top 5 DIYCOOL 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
1ACIQ-48-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-48-AH324 tons48,000 Btu/h · Ducted100%2.0010.019.012.0CEE 25CEE 26XcelES CC1215387244Ducted, 3.5–4.5 tons83.178.987.478.9
2EZ-48Z-M5BDIYCOOL · EZ Series3.5 tons43,000 Btu/h · Ducted79%2.0010.520.012.0CEE 25CEE 26XcelES CC3216980927Ducted, 3.5–4.5 tons80.270.589.970.5
3ACIQ-60-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-60-AH324.5 tons53,000 Btu/h · Ducted100%2.1010.518.511.5CEE 25CEE 26CEE AdvXcelDOEES CC1215387245Ducted, 3.5–4.5 tons79.085.173.085.1
4EZ-18ZPL-HP230BDIYCOOL · EZ Serieswith ductless indoor unit EZ-18W-MB1.5 tons18,000 Btu/h · Non-ducted71%2.4411.522.513.7CEE 25CEE 26XcelES CC1216980898Non-ducted, up to 1.5 tons73.373.173.473.1
5ACIQ-24-HP32DIYCOOL · R32 Extreme Heat Unitarywith ducted air handler ACIQ-24-AH322 tons24,000 Btu/h · Ducted100%2.0010.018.012.5CEE 25CEE 26XcelES CC1215387242Ducted, 2 tons73.176.269.976.2

Best model on each rating

DIYCOOL’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FEZ-18ZPL-HP230B2.44Non-ducted, up to 1.5 tons98%216980898
Capacity retention at 5°FACIQ-48-HP32100%Ducted, 3.5–4.5 tons94%215387244
HSPF2EZ-36-HPB10.3Ducted, 2.5–3 tons91%216980846
SEER2EZ-48Z-M5B20.0Ducted, 3.5–4.5 tons91%216980927
EER2ACIQ-48-HP3212.0Ducted, 3.5–4.5 tons83%215387244
Heating capacity at 5°FACIQ-60-HP3254,000 Btu/hDucted, 3.5–4.5 tons98%215387245

All 24 DIYCOOL models in Explore

DIYCOOL 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.
DIYCOOL: 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, 2 tons76.2(50 is the typical model of its size class)ACIQ-24-HP32with ducted air handler ACIQ-24-AH324 of 4 models qualify · AHRI 21538724273.1(50 is the typical model of its size class)ACIQ-24-HP32with ducted air handler ACIQ-24-AH324 of 4 models have all five ratings · AHRI 215387242
Ducted, 2.5–3 tons76.9(50 is the typical model of its size class)ACIQ-36-HP32with ducted air handler ACIQ-36-AH324 of 4 models qualify · AHRI 21538724369.4(50 is the typical model of its size class)ACIQ-36-HP32with ducted air handler ACIQ-36-AH324 of 4 models have all five ratings · AHRI 215387243
Ducted, 3.5–4.5 tons85.1(50 is the typical model of its size class)ACIQ-60-HP32with ducted air handler ACIQ-60-AH327 of 7 models qualify · AHRI 21538724583.1(50 is the typical model of its size class)ACIQ-48-HP32with ducted air handler ACIQ-48-AH327 of 7 models have all five ratings · AHRI 215387244
Non-ducted, up to 1.5 tons73.1(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB3 of 6 models qualify · AHRI 21698089873.3(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB6 of 6 models have all five ratings · AHRI 216980898
Non-ducted, 2 tons42.8(50 is the typical model of its size class)EZ-27Z-M3B1 of 3 models qualify · AHRI 21698092256.2(50 is the typical model of its size class)EZ-24ZPL-HP230Bwith ductless indoor unit EZ-24W-MB3 of 3 models have all five ratings · AHRI 216980899
Non-ducted, 2.5–3 tons41.3(50 is the typical model of its size class)EZ-36Z-M4B1 of 2 models qualify · AHRI 21698092353.2(50 is the typical model of its size class)EZ-36Z-M4B2 of 2 models have all five ratings · AHRI 216980923
Non-ducted, 3.5–4.5 tons45.0(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models qualify · AHRI 21698092852.8(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models have all five ratings · AHRI 216980926

All-around board, every manufacturer

Newest DIYCOOL certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified DIYCOOL outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
EZ-48Z-M5BDIYCOOL · EZ Series3.5 tons43,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)2.0078%10.320.9CEE 25CEE 26XcelES CC3216980928
EZ-36Z-M4BDIYCOOL · EZ Series3 tons33,400 Btu/h · Ducted and non-ducted and mixed (multi-zone)2.0070%9.721.0CEE 25CEE 26XcelES CC3216980925
EZ-27Z-M3BDIYCOOL · EZ Series2 tons26,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)2.0571%9.321.5CEE 25CEE 26XcelES CC3216980922
EZ-18Z-M2BDIYCOOL · EZ Series1.5 tons18,000 Btu/h · Non-ducted2.3174%10.023.9CEE 25CEE 26XcelES CC1216980919
EZ-36ZPL-HP230BDIYCOOLwith ductless indoor unit EZ-36W-MB3 tons36,000 Btu/h · Non-ducted1.9761%8.518.0None1216980900

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