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MDX heat pump efficiency: 12 outdoor models compared

MDX has 12 heat pump outdoor models certified with this refrigerant group, in 12 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 MDX makes. MDX 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
12
AHRI certifications
12
Efficiency index
66%
Typical model vs same-size, same-type peers (12 models)
Meet CEE 2025
91.7%
11 models

How MDX 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.
MDX against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of MDX’s own modelsMDX is strongest on COP at 5°F (its typical model beats 81% of comparable models) and weakest on EER2 (46%).
  • MDX
  • Middle half of its models
  • Other ranked manufacturers
MDX

Source: AHRI Directory, NEEP · as of

Average peer percentile of MDX’s models
RatingBeats comparable modelsRankRaw median
Efficiency index12 models scored66%Not ranked—
COP at 5°F12 models scored81%Not ranked2.20
Capacity retention at 5°F12 models scored64%Not ranked75%
HSPF212 models scored79%Not ranked9.7
SEER212 models scored70%Not ranked18.0
EER212 models scored46%Not ranked11.0
Heating capacity at 5°F12 models scored64%Not ranked30,500 Btu/h

Standards met

Share of MDX’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)91.7%11
CEE 2026 Tier 1 (Split ASHP)91.7%11
CEE Advanced Tier (Split ASHP)16.7%2
Xcel Energy Colorado cold-climate ASHP (2025)91.7%11
DOE Cold Climate Heat Pump Challenge16.7%2
ENERGY STAR Cold Climate100%12

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
MDX’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
  • MDX (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 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, 2 tons379%80%78%77%
Ducted, 2.5–3 tons363%83%74%72%
Ducted, 3.5–4.5 tons661%81%82%67%

Every MDX model in the market

MDX’s 12 models with a known size and duct type, over the shape of the whole catalog.
MDX models by size and ratingColoured: MDX · grey shapes: all 14,508 models · lines: catalog medians by size
  • MDX models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 12 mdx 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 tons8651.701.802.002.102.46
Ducted, 4 tons7261.801.862.002.122.41
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 MDX 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 MDX 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
1MCHA-24HDCTO2MDX · TOP-DISCHARGEwith ducted air handler MCHA-24HDCANI22 tons24,000 Btu/h · Ducted100%2.3010.224,00019.0CEE 25CEE 26CEE AdvXcelDOEES CC1218516908Ducted, 2 tons89.5
2MCHA-24HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-24HDCNI22 tons24,000 Btu/h · Ducted100%2.209.524,00018.5CEE 25CEE 26CEE AdvXcelDOEES CC1218516912Ducted, 2 tons80.9
3MCHA-48HDCTO2MDX · TOP-DISCHARGEwith ducted air handler MCHA-48HDCANI24 tons48,000 Btu/h · Ducted79%2.2010.538,00016.5CEE 25CEE 26XcelES CC1218516910Ducted, 3.5–4.5 tons79.5
4MCHA-36HDCTO2MDX · TOP-DISCHARGEwith ducted air handler MCHA-36HDCANI23 tons34,200 Btu/h · Ducted75%2.3010.025,60018.0CEE 25CEE 26XcelES CC1218516909Ducted, 2.5–3 tons78.1
5MCHA-48HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-48HDCNI24 tons48,000 Btu/h · Ducted75%2.259.836,00017.5CEE 25CEE 26XcelES CC1218516914Ducted, 3.5–4.5 tons76.6

All-around best

Top 5 MDX 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
1MCHA-24HDCTO2MDX · TOP-DISCHARGEwith ducted air handler MCHA-24HDCANI22 tons24,000 Btu/h · Ducted100%2.3010.219.012.5CEE 25CEE 26CEE AdvXcelDOEES CC1218516908Ducted, 2 tons85.089.580.689.5
2MHPA-24DCTOMDX · T Serieswith ducted air handler MHPA-24DCTI2 tons24,000 Btu/h · Ducted74%2.209.520.014.0CEE 25CEE 26XcelES CC1217933370Ducted, 2 tons79.365.193.465.1
3MCHA-24HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-24HDCNI22 tons24,000 Btu/h · Ducted100%2.209.518.512.0CEE 25CEE 26CEE AdvXcelDOEES CC1218516912Ducted, 2 tons73.580.966.280.9
4MHPA-48DCTOMDX · T Serieswith ducted air handler MHPA-48DCTI4 tons48,000 Btu/h · Ducted73%2.209.818.511.0CEE 25CEE 26XcelES CC1217933372Ducted, 3.5–4.5 tons68.373.363.273.3
5MCHA-48HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-48HDCNI24 tons48,000 Btu/h · Ducted75%2.259.817.511.0CEE 25CEE 26XcelES CC1218516914Ducted, 3.5–4.5 tons67.476.658.176.6

Best model on each rating

MDX’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FMCHA-36HDCTO22.30Ducted, 2.5–3 tons89%218516909
Capacity retention at 5°FMCHA-24HDCTO2100%Ducted, 2 tons92%218516908
HSPF2MCHA-48HDCTO210.5Ducted, 3.5–4.5 tons90%218516910
SEER2MHPA-24DCTO20.0Ducted, 2 tons87%217933370
EER2MHPA-24DCTO14.0Ducted, 2 tons98%217933370
Heating capacity at 5°FMCHA-24HDCTO224,000 Btu/hDucted, 2 tons89%218516908

All 12 MDX models in Explore

MDX 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.
MDX: 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 tons89.5(50 is the typical model of its size class)MCHA-24HDCTO2with ducted air handler MCHA-24HDCANI23 of 3 models qualify · AHRI 21851690885.0(50 is the typical model of its size class)MCHA-24HDCTO2with ducted air handler MCHA-24HDCANI23 of 3 models have all five ratings · AHRI 218516908
Ducted, 2.5–3 tons78.1(50 is the typical model of its size class)MCHA-36HDCTO2with ducted air handler MCHA-36HDCANI23 of 3 models qualify · AHRI 21851690965.1(50 is the typical model of its size class)MHPA-36DCTOwith ducted air handler MHPA-36DCTI3 of 3 models have all five ratings · AHRI 217933371
Ducted, 3.5–4.5 tons79.5(50 is the typical model of its size class)MCHA-48HDCTO2with ducted air handler MCHA-48HDCANI26 of 6 models qualify · AHRI 21851691068.3(50 is the typical model of its size class)MHPA-48DCTOwith ducted air handler MHPA-48DCTI6 of 6 models have all five ratings · AHRI 217933372

All-around board, every manufacturer

Newest MDX certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified MDX outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
MCHA-60HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-60HDCNI24.5 tons54,000 Btu/h · Ducted2.2074%9.016.7CEE 25CEE 26XcelES CC1218516915
MCHA-48HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-48HDCNI24 tons48,000 Btu/h · Ducted2.2575%9.817.5CEE 25CEE 26XcelES CC1218516914
MCHA-36HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-36HDCNI23 tons34,200 Btu/h · Ducted2.1076%9.018.0CEE 25CEE 26XcelES CC1218516913
MCHA-24HDCSO2MDX · SIDE-DISCHARGEwith ducted air handler MCHA-24HDCNI22 tons24,000 Btu/h · Ducted2.20100%9.518.5CEE 25CEE 26CEE AdvXcelDOEES CC1218516912
MCHA-60HDCTO2MDX · TOP-DISCHARGEwith ducted air handler MCHA-60HDCANI24.5 tons54,000 Btu/h · Ducted2.2074%9.816.2CEE 25CEE 26XcelES CC1218516911

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Manufacturers of a similar size, side by side.

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