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DIAMONDAIR heat pump efficiency: 25 outdoor models compared

DIAMONDAIR has 25 heat pump outdoor models certified with this refrigerant group, in 74 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 DIAMONDAIR makes. DIAMONDAIR 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
25
AHRI certifications
74
Efficiency index
42%
Typical model vs same-size, same-type peers (22 models)
Meet CEE 2025
36%
9 models

How DIAMONDAIR 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.
DIAMONDAIR against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of DIAMONDAIR’s own modelsDIAMONDAIR is strongest on EER2 (its typical model beats 53% of comparable models) and weakest on COP at 5°F (30%).
  • DIAMONDAIR
  • Middle half of its models
  • Other ranked manufacturers
DIAMONDA…

Source: AHRI Directory, NEEP · as of

Average peer percentile of DIAMONDAIR’s models
RatingBeats comparable modelsRankRaw median
Efficiency index22 models scored42%Not ranked—
COP at 5°F22 models scored30%Not ranked1.82
Capacity retention at 5°F22 models scored34%Not ranked62%
HSPF229 models scored42%Not ranked7.5
SEER229 models scored38%Not ranked14.3
EER229 models scored53%Not ranked11.4
Heating capacity at 5°F22 models scored37%Not ranked13,800 Btu/h

Standards met

Share of DIAMONDAIR’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)36%9
CEE 2026 Tier 1 (Split ASHP)28%7
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)24%6
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.
DIAMONDAIR’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
  • DIAMONDAIR (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 modelsDucted, 3.5–4.5 tons1.911,492 modelsDucted, 5 tons and up1.90239 modelsNon-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
Ducted, up to 1.5 tons259%51%40%39%
Ducted, 2 tons212%1%15%10%
Ducted, 2.5–3 tons640%13%35%39%
Ducted, 3.5–4.5 tons631%4%29%28%
Ducted, 5 tons and up119%4%9%12%
Non-ducted, up to 1.5 tons747%52%60%40%
Non-ducted, 2 tons240%45%54%32%
Non-ducted, 2.5–3 tons260%27%61%91%
Non-ducted, 3.5–4.5 tons140%22%57%51%

Every DIAMONDAIR model in the market

DIAMONDAIR’s 29 models with a known size and duct type, over the shape of the whole catalog.
DIAMONDAIR models by size and ratingColoured: DIAMONDAIR · grey shapes: all 11,475 models · lines: catalog medians by size
  • DIAMONDAIR models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 29 diamondair 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 DIAMONDAIR 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 DIAMONDAIR 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
1D2024SHO2DIAMONDAIRwith ductless indoor unit DF2024CI22 tons24,000 Btu/h · Non-ducted103%2.0011.525,80020.5CEE 25CEE 26Xcel3210857272Non-ducted, 2 tons86.1
2D2009SHO2DIAMONDAIRwith ductless indoor unit DF2009HMSI21 ton9,000 Btu/h · Non-ducted94%1.9011.611,30026.4CEE 25CEE 26Xcel3210857265Non-ducted, up to 1.5 tons74.8
3D2018SHO2DIAMONDAIRwith ductless indoor unit DF2018HMSI21.5 tons18,000 Btu/h · Non-ducted96%1.8910.617,20022.0CEE 25CEE 26Xcel3210857267Non-ducted, up to 1.5 tons70.2
4D2012SHO2DIAMONDAIRwith ductless indoor unit DF2012HMSI21 ton12,000 Btu/h · Non-ducted92%1.8910.511,00023.1CEE 25CEE 26Xcel3210857266Non-ducted, up to 1.5 tons68.2
5DF30M2Z3DIAMONDAIR2.5 tons28,000 Btu/h · Ducted71%1.839.220,00021.0CEE 25CEE 26Xcel3210857281Ducted, 2.5–3 tons57.4

All-around best

Top 5 DIAMONDAIR 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
1D2009SHO2DIAMONDAIRwith ductless indoor unit DF2009HMSI21 ton9,000 Btu/h · Non-ducted94%1.9011.626.415.8CEE 25CEE 26Xcel3210857265Non-ducted, up to 1.5 tons84.474.894.174.8
2DF30M2Z3DIAMONDAIR2.5 tons28,000 Btu/h · Ducted71%1.839.221.011.7CEE 25CEE 26Xcel3210857281Ducted, 2.5–3 tons71.557.485.657.4
3D2012SHO2DIAMONDAIRwith ductless indoor unit DF2012HMSI21 ton12,000 Btu/h · Non-ducted92%1.8910.523.113.0CEE 25CEE 26Xcel3210857266Non-ducted, up to 1.5 tons71.268.274.168.2
4D2024SHO2DIAMONDAIRwith ductless indoor unit DF2024HMSI22 tons23,000 Btu/h · Non-ducted88%1.8010.322.312.5CEE 25CEE 26Xcel3210857268Non-ducted, 2 tons70.761.280.286.1
5D2018SHO2DIAMONDAIRwith ductless indoor unit DF2018HMSI21.5 tons18,000 Btu/h · Non-ducted96%1.8910.622.013.0CEE 25CEE 26Xcel3210857267Non-ducted, up to 1.5 tons68.570.266.870.2

Best model on each rating

DIAMONDAIR’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FD1612HMSOF2.10Non-ducted, up to 1.5 tons78%207192276
Capacity retention at 5°FD2024SHO2103%Non-ducted, 2 tons92%210857272
HSPF2D2024SHO211.5Non-ducted, 2 tons97%210857272
SEER2DF30M2Z321.0Ducted, 2.5–3 tons98%210857281
EER2D2009SHO215.8Non-ducted, up to 1.5 tons95%210857265
Heating capacity at 5°FD2018SHO217,200 Btu/hNon-ducted, up to 1.5 tons90%210857267

All 25 DIAMONDAIR models in Explore

DIAMONDAIR 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.
DIAMONDAIR: 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 tons52.0(50 is the typical model of its size class)DF18M2Z21 of 2 models qualify · AHRI 21085727859.4(50 is the typical model of its size class)DF18M2Z21 of 2 models have all five ratings · AHRI 210857278
Ducted, 2 tonsNone on this board (0 of 2 models qualify)12.4(50 is the typical model of its size class)D1424HPG21 of 2 models have all five ratings · AHRI 212586117
Ducted, 2.5–3 tons57.4(50 is the typical model of its size class)DF30M2Z31 of 6 models qualify · AHRI 21085728171.5(50 is the typical model of its size class)DF30M2Z34 of 6 models have all five ratings · AHRI 210857281
Ducted, 3.5–4.5 tonsNone on this board (0 of 6 models qualify)52.1(50 is the typical model of its size class)DF55M2Z53 of 6 models have all five ratings · AHRI 210857287
Ducted, 5 tons and upNone on this board (0 of 1 models qualify)19.3(50 is the typical model of its size class)D1460HPL21 of 1 models have all five ratings · AHRI 212586122
Non-ducted, up to 1.5 tons74.8(50 is the typical model of its size class)D2009SHO2with ductless indoor unit DF2009HMSI23 of 7 models qualify · AHRI 21085726584.4(50 is the typical model of its size class)D2009SHO2with ductless indoor unit DF2009HMSI27 of 7 models have all five ratings · AHRI 210857265
Non-ducted, 2 tons86.1(50 is the typical model of its size class)D2024SHO2with ductless indoor unit DF2024CI21 of 2 models qualify · AHRI 21085727270.7(50 is the typical model of its size class)D2024SHO2with ductless indoor unit DF2024HMSI22 of 2 models have all five ratings · AHRI 210857268
Non-ducted, 2.5–3 tons49.3(50 is the typical model of its size class)DF30M2Z31 of 2 models qualify · AHRI 21085728066.7(50 is the typical model of its size class)DF30M2Z32 of 2 models have all five ratings · AHRI 210857280
Non-ducted, 3.5–4.5 tonsNone on this board (0 of 1 models qualify)40.4(50 is the typical model of its size class)DF55M2Z51 of 1 models have all five ratings · AHRI 210857286

All-around board, every manufacturer

Newest DIAMONDAIR certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified DIAMONDAIR outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
D1460HCL2DIAMONDAIRwith ducted air handler D1560HAEAL+TXV4.5 tons54,500 Btu/h · Ducted——7.514.3None2213927356
D1448HCL2DIAMONDAIRwith ducted air handler D1560HAEAL+TXV4 tons45,000 Btu/h · Ducted——7.815.2None4213927355
D1442HCL2DIAMONDAIRwith ducted air handler D1560HAEAL+TXV3.5 tons41,500 Btu/h · Ducted——7.815.2None6213927354
D1424HCL2DIAMONDAIRwith ducted air handler D1424HAEAL+TXV2 tons23,600 Btu/h · Ducted——7.514.3None9213927353
D1418HCL2DIAMONDAIRwith ducted air handler D1424HAEAL+TXV1.5 tons18,000 Btu/h · Ducted——7.514.3None4213927352

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