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ACD vs AIRTEMP heat pumps

Measured against models of the same size and duct type, ACD scores higher on 6 of the 6 ratings. ACD has 25 outdoor models, AIRTEMP has 25 outdoor models. ACD and AIRTEMP have no QMID on file and are not ranked. They share hardware: 11 equipment families appear under both names.

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CompareData as of updated · sources

Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.
ACD and AIRTEMP on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, ACD scores higher on 6 of the 6 ratings.
  • ACD
  • AIRTEMP
  • Other ranked manufacturers
ACDAIRTEMP

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingACDAIRTEMP
Efficiency index51% (higher)median —45% (higher)median —
COP at 5°F36% (higher)median 1.8232% (higher)median 1.81
Capacity retention at 5°F69% (higher)median 78%65% (higher)median 77%
HSPF247% (higher)median 9.037% (higher)median 8.5
SEER253% (higher)median 20.038% (higher)median 17.0
EER251% (higher)median 12.044% (higher)median 11.0
Heating capacity at 5°F67% (higher)median 21,600 Btu/h63% (higher)median 19,800 Btu/h
Outdoor models2525
AHRI certifications5158

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardACDAIRTEMP
CEE 2025 Tier 1 (Split ASHP)88%22 models48%12 models
CEE 2026 Tier 1 (Split ASHP)84%21 models48%12 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)88%22 models52%13 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate72%18 models32%8 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.
Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 7 groups where both have models
  • ACD
  • AIRTEMP
  • 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

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeACDAIRTEMP
Ducted, up to 1.5 tons1 · index 31%2 · index 31%
Ducted, 2 tons2 · index 53%3 · index 53%
Ducted, 2.5–3 tons3 · index 52%6 · index 52%
Ducted, 3.5–4.5 tons1 · index 63%4 · index 63%
Non-ducted, up to 1.5 tons11 · index 51%8 · index 28%
Non-ducted, 2 tons5 · index 54%2 · index 57%
Non-ducted, 2.5–3 tons6 · index 54%5 · index 60%
Non-ducted, 3.5–4.5 tons1 · index 19%None

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). 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.
Size and duct typeACDCold-climate score, best modelAIRTEMPCold-climate score, best model
Ducted, up to 1.5 tons35.6(50 is the typical model of its size class)MPD18KCH21SB-O1 of 1 models qualify · AHRI 21053413235.6(50 is the typical model of its size class)GXH18(5.3)FMK4DH-11 of 2 models qualify · AHRI 210276818
Ducted, 2 tons50.1(50 is the typical model of its size class)MPD24KCH21SB-O1 of 1 models qualify · AHRI 21053413350.1(50 is the typical model of its size class)GXH24(7.0)FMK4DH-11 of 2 models qualify · AHRI 210276819
Ducted, 2.5–3 tons55.3(50 is the typical model of its size class)FXD-ACD36with ducted air handler AH2364 of 4 models qualify · AHRI 20749790255.3(50 is the typical model of its size class)GXH24-36MSK4DHwith ducted air handler GMH**-36MSK4DH14 of 7 models qualify · AHRI 206724409
Ducted, 3.5–4.5 tons58.1(50 is the typical model of its size class)FXD-ACD60with ducted air handler AH2481 of 1 models qualify · AHRI 20749790358.1(50 is the typical model of its size class)GXH48-60MSK4DHwith ducted air handler GMH48-**MSK4DH11 of 4 models qualify · AHRI 206724410
Non-ducted, up to 1.5 tons80.1(50 is the typical model of its size class) (higher)UHD09KCH38SB-Owith ductless indoor unit UHD09KCH38SB-I10 of 11 models qualify · AHRI 20240983273.1(50 is the typical model of its size class)GXH18(5.3)FMK4DH-17 of 8 models qualify · AHRI 210276805
Non-ducted, 2 tons76.1(50 is the typical model of its size class)MPD24KCH21SB-O4 of 5 models qualify · AHRI 21053412876.1(50 is the typical model of its size class)GXH24(7.0)FMK4DH-12 of 2 models qualify · AHRI 210276806
Non-ducted, 2.5–3 tons73.7(50 is the typical model of its size class)MPD42KCH21SB-O6 of 6 models qualify · AHRI 21053413173.7(50 is the typical model of its size class)GXH42(12.3)FMK4DH-15 of 5 models qualify · AHRI 210276804
Non-ducted, 3.5–4.5 tons31.6(50 is the typical model of its size class)MUD42KCH23S-O1 of 1 models qualify · AHRI 206428587No models in this size class

All-around best

Best all-around model per size and duct type. 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.
Size and duct typeACDAll-around score, best modelAIRTEMPAll-around score, best model
Ducted, up to 1.5 tons31.2(50 is the typical model of its size class)MPD18KCH21SB-O1 of 1 models have all five ratings · AHRI 21053413231.2(50 is the typical model of its size class)GXH18(5.3)FMK4DH-11 of 2 models have all five ratings · AHRI 210276818
Ducted, 2 tons60.8(50 is the typical model of its size class)FXD-ACD36with ducted air handler AH2242 of 2 models have all five ratings · AHRI 20749790160.8(50 is the typical model of its size class)GXH24-36MSK4DHwith ducted air handler GMH24-**MSK4DH12 of 3 models have all five ratings · AHRI 206724408
Ducted, 2.5–3 tons53.1(50 is the typical model of its size class)MPD30KCH21SB-O3 of 3 models have all five ratings · AHRI 21053413453.1(50 is the typical model of its size class)GXH30(8.8)FMK4DH-13 of 6 models have all five ratings · AHRI 210276820
Ducted, 3.5–4.5 tons63.3(50 is the typical model of its size class)FXD-ACD60with ducted air handler AH2481 of 1 models have all five ratings · AHRI 20749790363.3(50 is the typical model of its size class)GXH48-60MSK4DHwith ducted air handler GMH48-**MSK4DH11 of 4 models have all five ratings · AHRI 206724410
Non-ducted, up to 1.5 tons88.7(50 is the typical model of its size class) (higher)UHD09KCH38SB-Owith ductless indoor unit UHD09KCH38SB-I11 of 11 models have all five ratings · AHRI 20240983258.0(50 is the typical model of its size class)GXH18(5.3)FMK4DH-18 of 8 models have all five ratings · AHRI 210276805
Non-ducted, 2 tons76.3(50 is the typical model of its size class) (higher)UHD24KCH22S-Owith ductless indoor unit UHD24KCH22S-I5 of 5 models have all five ratings · AHRI 20213278971.5(50 is the typical model of its size class)GXH24(7.0)FMK4DH-12 of 2 models have all five ratings · AHRI 210276806
Non-ducted, 2.5–3 tons70.2(50 is the typical model of its size class)MPD42KCH21SB-O6 of 6 models have all five ratings · AHRI 21053413170.2(50 is the typical model of its size class)GXH42(12.3)FMK4DH-15 of 5 models have all five ratings · AHRI 210276804
Non-ducted, 3.5–4.5 tons18.7(50 is the typical model of its size class)MUD42KCH23S-O1 of 1 models have all five ratings · AHRI 206428587No models in this size class

All-around board, every manufacturer

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.
Top model per rating by peer percentile, with its AHRI-certified value and peer group
RatingACDAIRTEMP
COP at 5°Fbeats 89% · 2.21MPD18KCH21SB-ONon-ducted, up to 1.5 tonsbeats 89% · 2.21GXH18(5.3)FMK4DH-1Non-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 99% · 144%UHD09KCH38SB-ONon-ducted, up to 1.5 tonsbeats 85% · 89%GXH30(8.8)FMK4DH-1Ducted, 2.5–3 tons
HSPF2beats 88% · 11.0UHD09KCH38SB-ONon-ducted, up to 1.5 tonsbeats 82% · 10.0GXH36(10.6)FMK4DH-1Non-ducted, 2.5–3 tons
SEER2beats 95% · 27.0UHD09KCH38SB-ONon-ducted, up to 1.5 tonsbeats 83% · 24.0GXH12(3.5)LSK4DH2Non-ducted, up to 1.5 tons
EER2beats 99% · 16.6UHD09KCH38SB-ONon-ducted, up to 1.5 tonsbeats 84% · 12.5GXH30(8.8)FMK4DH-1Non-ducted, 2.5–3 tons
Heating capacity at 5°Fbeats 99% · 21,800 Btu/hMUD18KCH23S-ONon-ducted, up to 1.5 tonsbeats 86% · 14,500 Btu/hGXH18(5.3)LSK4DH2Non-ducted, up to 1.5 tons

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