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MAXI AIR heat pump efficiency: 19 outdoor models compared

MAXI AIR has 19 heat pump outdoor models certified with this refrigerant group, in 45 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 MAXI AIR makes. MAXI AIR 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
19
AHRI certifications
45
Efficiency index
67%
Typical model vs same-size, same-type peers (20 models)
Meet CEE 2025
68.4%
13 models

How MAXI AIR 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.
MAXI AIR against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of MAXI AIR’s own modelsMAXI AIR is strongest on SEER2 (its typical model beats 76% of comparable models) and weakest on COP at 5°F (41%).
  • MAXI AIR
  • Middle half of its models
  • Other ranked manufacturers
MAXI AIR

Source: AHRI Directory, NEEP · as of

Average peer percentile of MAXI AIR’s models
RatingBeats comparable modelsRankRaw median
Efficiency index20 models scored67%Not ranked—
COP at 5°F20 models scored41%Not ranked1.87
Capacity retention at 5°F20 models scored70%Not ranked86%
HSPF223 models scored75%Not ranked10.3
SEER223 models scored76%Not ranked22.2
EER223 models scored63%Not ranked12.5
Heating capacity at 5°F20 models scored68%Not ranked18,000 Btu/h

Standards met

Share of MAXI AIR’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)68.4%13
CEE 2026 Tier 1 (Split ASHP)68.4%13
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)73.7%14
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate52.6%10

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
MAXI AIR’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
  • MAXI AIR (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, 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, 2.5–3 tons1.85975 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, 2 tons2——58%77%
Ducted, 2.5–3 tons767%30%73%78%
Ducted, 3.5–4.5 tons153%49%88%55%
Non-ducted, up to 1.5 tons964%48%71%74%
Non-ducted, 2.5–3 tons478%40%92%81%

Every MAXI AIR model in the market

MAXI AIR’s 23 models with a known size and duct type, over the shape of the whole catalog.
MAXI AIR models by size and ratingColoured: MAXI AIR · grey shapes: all 11,475 models · lines: catalog medians by size
  • MAXI AIR models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 23 maxi air 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 MAXI AIR 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 MAXI AIR 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
1NE-T53-MULTI36EMAXI AIR · NE seriesAlso listed as NE-T53-MULTI36E3 tons36,000 Btu/h · Non-ducted97%1.9010.336,00022.2CEE 25CEE 26Xcel3213927622Non-ducted, 2.5–3 tons79.3
2MAXS-4260MAXI AIR · MAXS serieswith ducted air handler AHMS-60204.5 tons55,000 Btu/h · Ducted82%1.919.448,50015.3ES CC2210426581Ducted, 3.5–4.5 tons71.3
3YS21F-18HRDN1MAXI AIR · YS serieswith ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT1.5 tons18,000 Btu/h · Non-ducted70%2.3810.312,60023.7CEE 25CEE 26XcelES CC2203238010Non-ducted, up to 1.5 tons70.6
4MAXS-2430MAXI AIRwith ducted air handler NE-F52-MAC36HWD2.5 tons30,000 Btu/h · Ducted82%1.859.727,00015.5CEE 25CEE 26XcelES CC4213265613Ducted, 2.5–3 tons67.8
5NE-T52-SUPAE18EMAXI AIR · NE serieswith ductless indoor unit NE-T52-SUPAE18IAlso listed as NE-T53-AEG18EXT1.5 tons18,000 Btu/h · Non-ducted100%1.8011.318,00021.5CEE 25CEE 26XcelES CC2212348362Non-ducted, up to 1.5 tons67.2

All-around best

Top 5 MAXI AIR 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
1NE-T53-MULTI36EMAXI AIR · NE seriesAlso listed as NE-T53-MULTI36E3 tons36,000 Btu/h · Non-ducted97%1.9010.322.213.6CEE 25CEE 26Xcel3213927622Non-ducted, 2.5–3 tons82.879.386.479.3
2YS21F-18HRDN1MAXI AIR · YS serieswith ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT1.5 tons18,000 Btu/h · Non-ducted70%2.3810.323.713.5CEE 25CEE 26XcelES CC2203238010Non-ducted, up to 1.5 tons75.970.681.270.6
3NE-T52-SUPAE12EMAXI AIR · NE serieswith ductless indoor unit NE-T52-SUPAE12IAlso listed as NE-T53-AEG12EXT1 ton12,000 Btu/h · Non-ducted100%1.8010.425.514.0CEE 25CEE 26XcelES CC2212348360Non-ducted, up to 1.5 tons75.562.488.662.4
4NE-T53-MULTI28EMAXI AIR · NE seriesAlso listed as NE-T53-MULTI28E2.5 tons28,000 Btu/h · Ducted89%1.809.520.011.7CEE 25CEE 26Xcel3213927620Ducted, 2.5–3 tons74.666.782.666.7
5NE-T53-MULTI28EMAXI AIR · NE seriesAlso listed as NE-T53-MULTI28E2.5 tons28,000 Btu/h · Non-ducted89%1.8010.623.012.5CEE 25CEE 26Xcel3213927619Non-ducted, 2.5–3 tons72.961.484.361.4

Best model on each rating

MAXI AIR’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FYS21F-18HRDN1Also listed as NE-T52-PLA18INT2.38Non-ducted, up to 1.5 tons96%203238010
Capacity retention at 5°FNE-T53-MULTI36EAlso listed as NE-T53-MULTI36E97%Non-ducted, 2.5–3 tons85%213927622
HSPF2NE-T53-MULTI28EAlso listed as NE-T53-MULTI28E10.6Non-ducted, 2.5–3 tons95%213927619
SEER2NE-T53-MULTI28EAlso listed as NE-T53-MULTI28E20.0Ducted, 2.5–3 tons92%213927620
EER2NE-T53-MULTI36EAlso listed as NE-T53-MULTI36E13.6Non-ducted, 2.5–3 tons96%213927622
Heating capacity at 5°FMAXS-426048,500 Btu/hDucted, 3.5–4.5 tons95%210426581

All 19 MAXI AIR models in Explore

MAXI AIR 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.
MAXI AIR: 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 tonsNone on this board (0 of 2 models qualify)None on this board (0 of 2 models have all five ratings)
Ducted, 2.5–3 tons67.8(50 is the typical model of its size class)MAXS-2430with ducted air handler NE-F52-MAC36HWD6 of 7 models qualify · AHRI 21326561374.6(50 is the typical model of its size class)NE-T53-MULTI28EAlso listed as NE-T53-MULTI28E6 of 7 models have all five ratings · AHRI 213927620
Ducted, 3.5–4.5 tons71.3(50 is the typical model of its size class)MAXS-4260with ducted air handler AHMS-60201 of 1 models qualify · AHRI 21042658153.3(50 is the typical model of its size class)MAXS-4260with ducted air handler AHMS-60201 of 1 models have all five ratings · AHRI 210426581
Non-ducted, up to 1.5 tons70.6(50 is the typical model of its size class)YS21F-18HRDN1with ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT8 of 9 models qualify · AHRI 20323801075.9(50 is the typical model of its size class)YS21F-18HRDN1with ductless indoor unit YS21F-18HRDN1Also listed as NE-T52-PLA18INT9 of 9 models have all five ratings · AHRI 203238010
Non-ducted, 2.5–3 tons79.3(50 is the typical model of its size class)NE-T53-MULTI36EAlso listed as NE-T53-MULTI36E4 of 4 models qualify · AHRI 21392762282.8(50 is the typical model of its size class)NE-T53-MULTI36EAlso listed as NE-T53-MULTI36E4 of 4 models have all five ratings · AHRI 213927622

All-around board, every manufacturer

Newest MAXI AIR certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified MAXI AIR outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
MAXS-2430MAXI AIR · MAX Serieswith ducted air handler NE-F52-MAC36HWD2.5 tons30,000 Btu/h · Ducted1.8582%9.715.5CEE 25CEE 26XcelES CC4218010971
NE-T53-MULTI36E*MAXI AIR · NE series3 tons36,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)1.8093%10.220.6CEE 25CEE 26XcelES CC3217754298
NE-T53-MULTI28E*MAXI AIR · NE series2.5 tons28,000 Btu/h · Ducted and non-ducted and mixed (multi-zone)1.8089%10.121.5CEE 25CEE 26XcelES CC3217754295
NE-T53-AEG18EXTMAXI AIR · NE serieswith ductless indoor unit NE-T53-AEG18INT1.5 tons18,000 Btu/h · Non-ducted1.80100%11.321.5CEE 25CEE 26XcelES CC2217754286
NE-T53-AEG12EXTMAXI AIR · NE serieswith ductless indoor unit NE-T53-AEG12INT1 ton12,000 Btu/h · Non-ducted1.80100%10.425.5CEE 25CEE 26XcelES CC2217754285

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

Compare MAXI AIR

Manufacturers of a similar size, side by side.

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