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EMI heat pump efficiency: 15 outdoor models compared

EMI has 15 heat pump outdoor models certified with this refrigerant group, in 27 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 EMI makes. EMI 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
15
AHRI certifications
27
Efficiency index
62%
Typical model vs same-size, same-type peers (19 models)
Meet CEE 2025
86.7%
13 models

How EMI 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.
EMI against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of EMI’s own modelsEMI is strongest on HSPF2 (its typical model beats 69% of comparable models) and weakest on COP at 5°F (56%).
  • EMI
  • Middle half of its models
  • Other ranked manufacturers
EMI

Source: AHRI Directory, NEEP · as of

Average peer percentile of EMI’s models
RatingBeats comparable modelsRankRaw median
Efficiency index19 models scored62%Not ranked—
COP at 5°F19 models scored56%Not ranked2.00
Capacity retention at 5°F19 models scored63%Not ranked95%
HSPF219 models scored69%Not ranked10.5
SEER219 models scored61%Not ranked21.4
EER219 models scored60%Not ranked12.5
Heating capacity at 5°F19 models scored60%Not ranked18,000 Btu/h

Standards met

Share of EMI’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)86.7%13
CEE 2026 Tier 1 (Split ASHP)86.7%13
CEE Advanced Tier (Split ASHP)6.7%1
Xcel Energy Colorado cold-climate ASHP (2025)73.3%11
DOE Cold Climate Heat Pump Challenge6.7%1
ENERGY STAR Cold Climate73.3%11

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
EMI’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
  • EMI (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, up to 1.5 tons1.901,783 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, up to 1.5 tons177%63%79%83%
Ducted, 2.5–3 tons281%56%87%86%
Ducted, 3.5–4.5 tons184%54%99%97%
Non-ducted, up to 1.5 tons860%61%67%59%
Non-ducted, 2 tons253%85%61%33%
Non-ducted, 2.5–3 tons446%32%53%48%
Non-ducted, 3.5–4.5 tons176%37%92%89%

Every EMI model in the market

EMI’s 19 models with a known size and duct type, over the shape of the whole catalog.
EMI models by size and ratingColoured: EMI · grey shapes: all 14,508 models · lines: catalog medians by size
  • EMI models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 19 emi 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 EMI 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 EMI 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
1EMXSZ106DAEMI · EMX Serieswith ductless indoor unit EMXWAL06DA0.5 tons6,000 Btu/h · Non-ducted110%2.4014.87,70025.5CEE 25CEE 26CEE AdvXcelDOEES CC1215444935Non-ducted, up to 1.5 tons96.7
2EMXSZ124DAEMI · EMX Serieswith ductless indoor unit EMXWAL24DA2 tons24,000 Btu/h · Non-ducted83%2.3413.524,20021.0CEE 25CEE 26XcelES CC1215444939Non-ducted, 2 tons88.4
3EMXMZ548DAEMI · EMX Series4 tons47,000 Btu/h · Ducted100%2.0011.048,00020.4CEE 25CEE 26XcelES CC3215444950Ducted, 3.5–4.5 tons82.7
4EMXMZ436DAEMI · EMX Series3 tons36,000 Btu/h · Ducted106%2.0010.438,00019.4CEE 25CEE 26XcelES CC3215444947Ducted, 2.5–3 tons82.5
5EMXMZ436DAEMI · EMX Series3 tons36,000 Btu/h · Non-ducted103%2.0010.637,00021.2CEE 25CEE 26XcelES CC3215444948Non-ducted, 2.5–3 tons78.0

All-around best

Top 5 EMI 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
1EMXSZ106DAEMI · EMX Serieswith ductless indoor unit EMXWAL06DA0.5 tons6,000 Btu/h · Non-ducted110%2.4014.825.518.0CEE 25CEE 26CEE AdvXcelDOEES CC1215444935Non-ducted, up to 1.5 tons96.296.795.796.7
2EMXMZ548DAEMI · EMX Series4 tons47,000 Btu/h · Ducted100%2.0011.020.411.7CEE 25CEE 26XcelES CC3215444950Ducted, 3.5–4.5 tons83.982.785.182.7
3EMXMZ436DAEMI · EMX Series3 tons36,000 Btu/h · Ducted106%2.0010.419.412.0CEE 25CEE 26XcelES CC3215444947Ducted, 2.5–3 tons83.682.584.882.5
4EMXMZ218DAEMI · EMX Series1.5 tons19,000 Btu/h · Non-ducted95%2.0010.425.015.0CEE 25CEE 26XcelES CC3215444940Non-ducted, up to 1.5 tons81.973.190.873.1
5EMXSZ109DAEMI · EMX Serieswith ductless indoor unit EMXWAL09DA1 ton9,000 Btu/h · Non-ducted96%1.8012.527.415.4CEE 25CEE 26XcelES CC1215444936Non-ducted, up to 1.5 tons80.665.196.165.1

Best model on each rating

EMI’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FEMXSZ106DA2.40Non-ducted, up to 1.5 tons97%215444935
Capacity retention at 5°FEMXSZ106DA110%Non-ducted, up to 1.5 tons94%215444935
HSPF2EMXSZ106DA14.8Non-ducted, up to 1.5 tons99%215444935
SEER2EMXMZ548DA20.4Ducted, 3.5–4.5 tons96%215444950
EER2EMXSZ106DA18.0Non-ducted, up to 1.5 tons99%215444935
Heating capacity at 5°FEMXMZ218DA19,000 Btu/hNon-ducted, up to 1.5 tons97%215444940

All 15 EMI models in Explore

EMI 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.
EMI: 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 tons70.8(50 is the typical model of its size class)EMXMZ218DA1 of 1 models qualify · AHRI 21544494177.4(50 is the typical model of its size class)EMXMZ218DA1 of 1 models have all five ratings · AHRI 215444941
Ducted, 2.5–3 tons82.5(50 is the typical model of its size class)EMXMZ436DA2 of 2 models qualify · AHRI 21544494783.6(50 is the typical model of its size class)EMXMZ436DA2 of 2 models have all five ratings · AHRI 215444947
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)EMXMZ548DA1 of 1 models qualify · AHRI 21544495083.9(50 is the typical model of its size class)EMXMZ548DA1 of 1 models have all five ratings · AHRI 215444950
Non-ducted, up to 1.5 tons96.7(50 is the typical model of its size class)EMXSZ106DAwith ductless indoor unit EMXWAL06DA6 of 8 models qualify · AHRI 21544493596.2(50 is the typical model of its size class)EMXSZ106DAwith ductless indoor unit EMXWAL06DA8 of 8 models have all five ratings · AHRI 215444935
Non-ducted, 2 tons88.4(50 is the typical model of its size class)EMXSZ124DAwith ductless indoor unit EMXWAL24DA2 of 2 models qualify · AHRI 21544493976.4(50 is the typical model of its size class)EMXSZ124DAwith ductless indoor unit EMXWAL24DA2 of 2 models have all five ratings · AHRI 215444939
Non-ducted, 2.5–3 tons78.0(50 is the typical model of its size class)EMXMZ436DA2 of 4 models qualify · AHRI 21544494878.3(50 is the typical model of its size class)EMXMZ436DA4 of 4 models have all five ratings · AHRI 215444946
Non-ducted, 3.5–4.5 tons73.4(50 is the typical model of its size class)EMXMZ548DA1 of 1 models qualify · AHRI 21544495175.6(50 is the typical model of its size class)EMXMZ548DA1 of 1 models have all five ratings · AHRI 215444949

All-around board, every manufacturer

Newest EMI certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified EMI outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
ECOSZ124DAEMI · ECO Serieswith ductless indoor unit ECOWAL24DA2 tons24,000 Btu/h · Non-ducted2.1171%9.018.5XcelES CC2215862730
ECOSZ118DAEMI · ECO Serieswith ductless indoor unit ECOWAL18DA1.5 tons18,000 Btu/h · Non-ducted1.9961%9.120.2CEE 25CEE 262215862729
ECOSZ112DAEMIwith ductless indoor unit ECOWAL12DA1 ton12,000 Btu/h · Non-ducted1.8067%9.221.3CEE 25CEE 262215862728
ECOSZ109DAEMI · ECO Serieswith ductless indoor unit ECOWAL09DA1 ton9,000 Btu/h · Non-ducted1.9970%9.421.6CEE 25CEE 26XcelES CC2215862727
EMXMZ548DAEMI · EMX Series4 tons47,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)2.0098%11.021.7CEE 25CEE 26XcelES CC3215444951

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