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EMI heat pump efficiency: 22 outdoor models compared

EMI has 22 heat pump outdoor models certified with this refrigerant group, in 41 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
22
AHRI certifications
41
Efficiency index
58%
Typical model vs same-size, same-type peers (25 models)
Meet CEE 2025
68.2%
15 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 68% of comparable models) and weakest on EER2 (48%).
  • 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 index25 models scored58%Not ranked—
COP at 5°F25 models scored49%Not ranked1.90
Capacity retention at 5°F25 models scored67%Not ranked82%
HSPF226 models scored68%Not ranked9.6
SEER226 models scored57%Not ranked18.4
EER226 models scored48%Not ranked10.9
Heating capacity at 5°F25 models scored64%Not ranked20,000 Btu/h

Standards met

Share of EMI’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)68.2%15
CEE 2026 Tier 1 (Split ASHP)68.2%15
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)63.6%14
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate72.7%16

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 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 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 tons255%45%54%52%
Ducted, 2 tons151%37%77%58%
Ducted, 2.5–3 tons463%39%90%65%
Ducted, 3.5–4.5 tons363%52%83%72%
Non-ducted, up to 1.5 tons856%54%65%53%
Non-ducted, 2 tons249%58%52%44%
Non-ducted, 2.5–3 tons557%43%55%50%
Non-ducted, 3.5–4.5 tons178%74%68%79%

Every EMI model in the market

EMI’s 26 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 11,475 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: 26 emi 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 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
1MHSZ106DAEMI · MH serieswith ductless indoor unit MHWAL06DA0.5 tons6,000 Btu/h · Non-ducted107%2.0913.67,50026.5CEE 25CEE 26XcelES CC1208121923Non-ducted, up to 1.5 tons89.3
2MHSZ124DAEMI · MH serieswith ductless indoor unit MHCAS24DA2 tons24,000 Btu/h · Non-ducted103%2.0011.525,80020.5CEE 25CEE 26XcelES CC2208121931Non-ducted, 2 tons86.1
3MHMZ436DAEMI · MH series3 tons36,000 Btu/h · Non-ducted97%1.9010.336,00022.2CEE 25CEE 26XcelES CC3208121938Non-ducted, 2.5–3 tons79.3
4MHSD136DACFCEMI · MHS Serieswith ducted air handler MHCO37DACFC3 tons35,000 Btu/h · Ducted82%2.0010.032,00015.2CEE 25CEE 26XcelES CC3218631475Ducted, 2.5–3 tons78.6
5MHMZ548DAEMI · MH series4 tons48,000 Btu/h · Non-ducted92%2.009.845,00021.8CEE 25CEE 26XcelES CC3208121941Non-ducted, 3.5–4.5 tons76.2

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
1MHSZ106DAEMI · MH serieswith ductless indoor unit MHWAL06DA0.5 tons6,000 Btu/h · Non-ducted107%2.0913.626.515.8CEE 25CEE 26XcelES CC1208121923Non-ducted, up to 1.5 tons92.089.394.789.3
2MHSZ109DAEMI · MH serieswith ductless indoor unit MHWAL09DA1 ton9,000 Btu/h · Non-ducted88%1.9711.528.116.2CEE 25CEE 26XcelES CC2208121924Non-ducted, up to 1.5 tons87.076.297.976.2
3MHSZ124DAEMI · MH serieswith ductless indoor unit MHWAL24DA2 tons24,000 Btu/h · Non-ducted86%2.2111.421.513.0CEE 25CEE 26XcelES CC2208121927Non-ducted, 2 tons84.384.584.186.1
4MHMZ436DAEMI · MH series3 tons36,000 Btu/h · Non-ducted97%1.9010.322.213.6CEE 25CEE 26XcelES CC3208121938Non-ducted, 2.5–3 tons82.879.386.479.3
5MHMZ548DAEMI · MH series4 tons47,000 Btu/h · Ducted87%2.009.020.911.7CEE 25CEE 26XcelES CC3208121942Ducted, 3.5–4.5 tons82.074.989.174.9

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°FMHSZ124DA2.21Non-ducted, 2 tons91%208121927
Capacity retention at 5°FMHSZ106DA107%Non-ducted, up to 1.5 tons92%208121923
HSPF2MHSZ106DA13.6Non-ducted, up to 1.5 tons98%208121923
SEER2MHMZ548DA20.9Ducted, 3.5–4.5 tons99%208121942
EER2MHSZ109DA16.2Non-ducted, up to 1.5 tons98%208121924
Heating capacity at 5°FMHMZ218DA20,000 Btu/hNon-ducted, up to 1.5 tons96%208121932

All 22 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 tons63.7(50 is the typical model of its size class)MHSD118DACFCwith ducted air handler MHCO24DACFC2 of 2 models qualify · AHRI 21863147263.4(50 is the typical model of its size class)MHSD118DACFCwith ducted air handler MHAH118DACFC2 of 2 models have all five ratings · AHRI 216372807
Ducted, 2 tons66.5(50 is the typical model of its size class)MHSD124DACFCwith ducted air handler MHAH124DACFC1 of 1 models qualify · AHRI 21637280865.8(50 is the typical model of its size class)MHSD124DACFCwith ducted air handler MHAH124DACFC1 of 1 models have all five ratings · AHRI 216372808
Ducted, 2.5–3 tons78.6(50 is the typical model of its size class)MHSD136DACFCwith ducted air handler MHCO37DACFC4 of 4 models qualify · AHRI 21863147574.6(50 is the typical model of its size class)MHMZ327DA4 of 4 models have all five ratings · AHRI 208121936
Ducted, 3.5–4.5 tons74.9(50 is the typical model of its size class)MHMZ548DA3 of 3 models qualify · AHRI 20812194282.0(50 is the typical model of its size class)MHMZ548DA3 of 3 models have all five ratings · AHRI 208121942
Non-ducted, up to 1.5 tons89.3(50 is the typical model of its size class)MHSZ106DAwith ductless indoor unit MHWAL06DA6 of 8 models qualify · AHRI 20812192392.0(50 is the typical model of its size class)MHSZ106DAwith ductless indoor unit MHWAL06DA8 of 8 models have all five ratings · AHRI 208121923
Non-ducted, 2 tons86.1(50 is the typical model of its size class)MHSZ124DAwith ductless indoor unit MHCAS24DA1 of 2 models qualify · AHRI 20812193184.3(50 is the typical model of its size class)MHSZ124DAwith ductless indoor unit MHWAL24DA2 of 2 models have all five ratings · AHRI 208121927
Non-ducted, 2.5–3 tons79.3(50 is the typical model of its size class)MHMZ436DA2 of 5 models qualify · AHRI 20812193882.8(50 is the typical model of its size class)MHMZ436DA4 of 5 models have all five ratings · AHRI 208121938
Non-ducted, 3.5–4.5 tons76.2(50 is the typical model of its size class)MHMZ548DA1 of 1 models qualify · AHRI 20812194177.9(50 is the typical model of its size class)MHMZ548DA1 of 1 models have all five ratings · AHRI 208121941

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.
MHSD136DACFCEMI · MHS Serieswith ducted air handler MHCO36DACFC3 tons35,000 Btu/h · Ducted2.0082%10.015.2CEE 25CEE 26XcelES CC3218722003
MHSD160DACFCEMI · MHS Serieswith ducted air handler MHCO60DACFC4.5 tons53,000 Btu/h · Ducted1.8085%8.614.5ES CC2218631477
MHSD148DACFCEMI · MHS Serieswith ducted air handler MHCO48DACFC4 tons46,000 Btu/h · Ducted1.8078%9.014.3ES CC2218631476
MHSD130DACFCEMI · MHS Serieswith ducted air handler MHCO36DACFC2.5 tons30,000 Btu/h · Ducted1.8582%9.715.5CEE 25CEE 26XcelES CC2218631474
MHSD124DACFCEMI · MHS Serieswith ducted air handler MHCO24DACFC2 tons24,000 Btu/h · Ducted1.9580%9.516.5CEE 25CEE 26XcelES CC2218631473

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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.