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Lennox heat pump efficiency: 313 outdoor models compared

Lennox has 313 heat pump outdoor models certified with this refrigerant group, in 75,630 AHRI-certified combinations. They are also sold as ALLIED COMMERCIAL, AirEase, Allied, Armstrong Air, COMFORT-AIRE, CONCORD, DUCANE. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes Lennox makes. Ranks are among manufacturers with a QMID on file and at least 10 scored models.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of updated · sources

Outdoor models
313
AHRI certifications
75,630
Efficiency index
56%
Typical model vs same-size, same-type peers (281 models)
Meet CEE 2025
46%
144 models

How Lennox 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.
Lennox against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Lennox’s own modelsLennox is strongest on COP at 5°F (its typical model beats 58% of comparable models) and weakest on heating capacity at 5°F (48%).
  • Lennox
  • Middle half of its models
  • Other ranked manufacturers
Lennox

Source: AHRI Directory, NEEP · as of

Average peer percentile of Lennox’s models
RatingBeats comparable modelsRankRaw median
Efficiency index281 models scored56%13th of 27—
COP at 5°F285 models scored58%10th of 272.00
Capacity retention at 5°F287 models scored48%19th of 2767%
HSPF2347 models scored49%17th of 278.5
SEER2347 models scored49%17th of 2717.0
EER2347 models scored54%14th of 2711.6
Heating capacity at 5°F287 models scored48%18th of 2718,560 Btu/h

Standards met

Share of Lennox’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)46%144
CEE 2026 Tier 1 (Split ASHP)45%141
CEE Advanced Tier (Split ASHP)1%3
Xcel Energy Colorado cold-climate ASHP (2025)29.4%92
DOE Cold Climate Heat Pump Challenge1%3
ENERGY STAR Cold Climate19.8%62

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
Lennox’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
  • Lennox (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 modelsNon-ducted, 5 tons and up2.1032 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 tons3160%64%58%57%
Ducted, 2 tons3558%54%46%53%
Ducted, 2.5–3 tons7255%57%45%44%
Ducted, 3.5–4.5 tons8657%61%45%44%
Ducted, 5 tons and up1345%38%50%62%
Non-ducted, up to 1.5 tons6654%55%53%50%
Non-ducted, 2 tons2257%62%63%54%
Non-ducted, 2.5–3 tons3755%53%49%48%
Non-ducted, 3.5–4.5 tons1657%62%46%46%
Non-ducted, 5 tons and up136%69%42%42%

Every Lennox model in the market

Lennox’s 379 models with a known size and duct type, over the shape of the whole catalog.
Lennox models by size and ratingColoured: Lennox · grey shapes: all 11,475 models · lines: catalog medians by size
  • Lennox models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 379 lennox 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 Lennox 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 Lennox 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
1A-VMH36QV-1ACOMFORT-AIRE · A-series3 tons36,000 Btu/h · Non-ducted103%2.0010.937,00022.4CEE 25CEE 26XcelES CC6214377756Non-ducted, 2.5–3 tons90.9
2MPC009S4S-1PLENNOX · MPC serieswith ductless indoor unit MWMC006S4-2P0.5 tons6,000 Btu/h · Non-ducted107%2.1013.67,50026.5CEE 25CEE 26CEE AdvXcelDOEES CC11213199199Non-ducted, up to 1.5 tons90.2
3A-VMH06SV-1COMFORT-AIRE · A-serieswith ductless indoor unit B-VMH06SV-1Also sold as Allied 4DHPS209S-1P0.5 tons6,000 Btu/h · Non-ducted107%2.0913.67,50026.5CEE 25CEE 26XcelES CC2207657385Non-ducted, up to 1.5 tons89.3
4MLB048S4S-1PLENNOX · M serieswith ducted air handler MMDB048S4-2P4 tons48,000 Btu/h · Ducted96%2.0210.346,00014.3ES CC3205782161Ducted, 3.5–4.5 tons88.9
5MLB048S4S-2PLENNOX · M serieswith ducted air handler MMDB048S4-*P4 tons48,000 Btu/h · Ducted96%2.0210.246,00014.3None10211034449Ducted, 3.5–4.5 tons88.6

All-around best

Top 5 Lennox 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
1MPC009S4S-1PLENNOX · MPC serieswith ductless indoor unit MWMC006S4-2P0.5 tons6,000 Btu/h · Non-ducted107%2.1013.626.515.8CEE 25CEE 26CEE AdvXcelDOEES CC11213199199Non-ducted, up to 1.5 tons92.490.294.690.2
2A-VMH06SV-1COMFORT-AIRE · A-serieswith ductless indoor unit B-VMH06SV-1Also sold as Allied 4DHPS209S-1P0.5 tons6,000 Btu/h · Non-ducted107%2.0913.626.515.8CEE 25CEE 26XcelES CC2207657385Non-ducted, up to 1.5 tons92.089.394.789.3
3LI009HO-380P432LENNOXwith ductless indoor unit LI009HI-380P4321 ton9,000 Btu/h · Non-ducted144%1.9111.027.016.6CEE 25CEE 26Xcel1208917513Non-ducted, up to 1.5 tons88.780.197.380.1
44DHP2S09S-1PAllied · 4DH SERIESwith ductless indoor unit DWM209S4-1P1 ton9,000 Btu/h · Non-ducted86%2.1912.325.515.0CEE 25CEE 26XcelES CC15208128182Non-ducted, up to 1.5 tons88.486.090.886.0
5MLB009S4S-1PLENNOX · M serieswith ductless indoor unit MWMC009S41 ton9,000 Btu/h · Non-ducted88%2.0011.528.116.2CEE 25CEE 26XcelES CC9210665627Non-ducted, up to 1.5 tons87.977.997.977.9

Best model on each rating

Lennox’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°F4HP18V36P3.19Ducted, 2 tons100%213348334
Capacity retention at 5°F4HP17L18P-**A147%Ducted, up to 1.5 tons100%214320262
HSPF2MLB048S4S-1P10.3Ducted, 3.5–4.5 tons99%205782161
SEER2SL25XPV-048-230A**21.8Ducted, 3.5–4.5 tons100%207436541
EER2SL25XPV-024-230A**15.0Ducted, 2 tons100%207436171
Heating capacity at 5°FMLB036S4S-2P42,926 Btu/hNon-ducted, 2.5–3 tons100%207699097

All 313 Lennox models in Explore

Lennox 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.
Lennox: 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 tons77.6(50 is the typical model of its size class)MPC009S4S-1Pwith ducted air handler MMDB009S4-*PAlso sold as AirEase 4DHPS209S-1P21 of 31 models qualify · AHRI 21103442385.6(50 is the typical model of its size class)MLB009S4S-1Pwith ducted air handler MMDB009S4-2P30 of 31 models have all five ratings · AHRI 207683524
Ducted, 2 tons81.1(50 is the typical model of its size class)MPC024S4S-1Pwith ducted air handler MMDB024S4-*PAlso sold as AirEase 4DHP2S24S-1P17 of 34 models qualify · AHRI 21103442684.1(50 is the typical model of its size class)EL22XPV-024-230A**with ducted air handler CBK47UHET-030-230-0Also sold as Armstrong Air 4SHP22LX124P-**A29 of 35 models have all five ratings · AHRI 214861258
Ducted, 2.5–3 tons83.4(50 is the typical model of its size class)MLB036S4S-1Pwith ducted air handler MMDB036S4-2PAlso listed as MLB036S4S-2P23 of 74 models qualify · AHRI 20578216083.7(50 is the typical model of its size class)A-VMH36QV-1A47 of 69 models have all five ratings · AHRI 214377757
Ducted, 3.5–4.5 tons88.9(50 is the typical model of its size class)MLB048S4S-1Pwith ducted air handler MMDB048S4-2P18 of 85 models qualify · AHRI 20578216187.7(50 is the typical model of its size class)SL25XPV-048-230A**with ducted air handler CBA38MV-048-230*+TDR49 of 84 models have all five ratings · AHRI 207436541
Ducted, 5 tons and upNone on this board (0 of 13 models qualify)68.9(50 is the typical model of its size class)4HP17L60P-**Awith ducted air handler L(E,G)M60H412 of 18 models have all five ratings · AHRI 212431768
Non-ducted, up to 1.5 tons90.2(50 is the typical model of its size class)MPC009S4S-1Pwith ductless indoor unit MWMC006S4-2P34 of 66 models qualify · AHRI 21319919992.4(50 is the typical model of its size class)MPC009S4S-1Pwith ductless indoor unit MWMC006S4-2P59 of 66 models have all five ratings · AHRI 213199199
Non-ducted, 2 tons86.1(50 is the typical model of its size class)MLB024S4S-1Pwith ductless indoor unit M33C024S4-1PAlso sold as Comfort-Aire A-VMH24SV-114 of 22 models qualify · AHRI 20768353484.3(50 is the typical model of its size class)MLB024S4S-1Pwith ductless indoor unit MWMC024S4-1PAlso sold as Comfort-Aire A-VMH24SV-1, Comfort-Aire A-VMH24SU-1, Comfort-Aire A-KMH24SU-120 of 22 models have all five ratings · AHRI 207683523
Non-ducted, 2.5–3 tons90.9(50 is the typical model of its size class)A-VMH36QV-1A12 of 37 models qualify · AHRI 21437775686.4(50 is the typical model of its size class)A-VMH36QV-1A27 of 37 models have all five ratings · AHRI 214377756
Non-ducted, 3.5–4.5 tons81.3(50 is the typical model of its size class)MLB048S4S-2Pwith ductless indoor unit M33C048S4-*P8 of 16 models qualify · AHRI 21103446077.9(50 is the typical model of its size class)MLB048S4M-2PAlso sold as Comfort-Aire A-VMH48PV-1, Allied 4DHP2S48M-1P11 of 16 models have all five ratings · AHRI 207699107
Non-ducted, 5 tons and upNone on this board (0 of 1 models qualify)36.2(50 is the typical model of its size class)GMV-60WL/C-T(U)1 of 1 models have all five ratings · AHRI 214728288

All-around board, every manufacturer

Newest Lennox certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified Lennox outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
4HP18V36PDUCANEwith indoor coil H,A,DG33936 and furnace 97G2UH090CV203 tons33,000 Btu/h · Ducted2.0251%8.217.0CEE 25CEE 26Xcel1,887217489467
HRG1542S1R-**ACOMFORT-AIREwith ducted air handler M60E36(1,2)+TXV+AMHE5D3.5 tons40,000 Btu/h · Ducted2.0653%7.815.2CEE 25CEE 26938217197970
HRG1524S1R-**ACOMFORT-AIREwith ducted air handler M36E32(1,2)+TXV+AMHE3D2 tons23,000 Btu/h · Ducted2.0451%7.716.0CEE 25CEE 26Xcel705217197870
4SHP18LX136PARMSTRONG AIRwith indoor coil H,A,DG9J*36+TXV and furnace A97US2V090C203 tons35,000 Btu/h · Ducted2.2253%8.518.0CEE 25CEE 26Xcel2,725217190954
A-VCD36SA-1Comfort Aire · MCD serieswith ducted air handler MCD30/36B1A3 tons35,000 Btu/h · Ducted1.8583%8.615.5CEE 25CEE 26XcelES CC10217123466

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Lennox includes these brand names as listed in AHRI: ALLIED COMMERCIAL, AirEase, Allied, Armstrong Air, COMFORT-AIRE, CONCORD, DUCANE, LENNOX. Standards are checked against published thresholds; program rules beyond ratings are not checked.