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AIRTEMP vs DiamondAir heat pumps

Measured against models of the same size and duct type, AIRTEMP scores higher on 2 of the 6 ratings. AIRTEMP has 47 outdoor models, DiamondAir has 7 outdoor models. AIRTEMP and DiamondAir have no QMID on file and are not ranked.

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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.
AIRTEMP and DiamondAir 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, AIRTEMP scores higher on 2 of the 6 ratings.
  • AIRTEMP
  • DiamondAir
  • Other ranked manufacturers
AIRTEMPDiamondA…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingAIRTEMPDiamondAir
Efficiency index36%median ——median —
COP at 5°F25%median 1.75—median —
Capacity retention at 5°F37%median 51%—median —
HSPF230% (higher)median 7.526% (higher)median 7.5
SEER235% (higher)median 14.321% (higher)median 14.3
EER248%median 11.060%median 11.7
Heating capacity at 5°F35%median 16,200 Btu/h—median —
Outdoor models477
AHRI certifications1477

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardAIRTEMPDiamondAir
CEE 2025 Tier 1 (Split ASHP)42.6%20 models0%0 models
CEE 2026 Tier 1 (Split ASHP)40.4%19 models0%0 models
CEE Advanced Tier (Split ASHP)4.3%2 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)40.4%19 models0%0 models
DOE Cold Climate Heat Pump Challenge4.3%2 models0%0 models
ENERGY STAR Cold Climate25.5%12 models0%0 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 · 4 groups where both have models
  • AIRTEMP
  • DiamondAir
  • All models of the group
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsDucted, 5 tons and up2.00321 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 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 typeAIRTEMPDiamondAir
Ducted, up to 1.5 tons2 · index 34%1 · index —
Ducted, 2 tons7 · index 30%1 · index —
Ducted, 2.5–3 tons11 · index 27%3 · index —
Ducted, 3.5–4.5 tons14 · index 32%2 · index —
Ducted, 5 tons and up1 · index 18%None
Non-ducted, up to 1.5 tons9 · index 45%None
Non-ducted, 2 tons3 · index 55%None
Non-ducted, 2.5–3 tons4 · index 52%None
Non-ducted, 3.5–4.5 tons1 · index 68%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 typeAIRTEMPCold-climate score, best modelDiamondAirCold-climate score, best model
Ducted, up to 1.5 tons39.3(50 is the typical model of its size class)DXH18FMK3IH1 of 2 models qualify · AHRI 215746300None on this board (0 of 1 models qualify)
Ducted, 2 tons49.0(50 is the typical model of its size class)DXH24FMK3IH1 of 6 models qualify · AHRI 215746302None on this board (0 of 1 models qualify)
Ducted, 2.5–3 tons76.9(50 is the typical model of its size class)UXH24-36MSK3IHwith ducted air handler UMD36MSK3IH3 of 12 models qualify · AHRI 217138203None on this board (0 of 3 models qualify)
Ducted, 3.5–4.5 tons85.1(50 is the typical model of its size class)UXH48-60MSK3IHwith ducted air handler UMD60MSK3IH2 of 14 models qualify · AHRI 217138205None on this board (0 of 2 models qualify)
Ducted, 5 tons and upNone on this board (0 of 1 models qualify)No models in this size class
Non-ducted, up to 1.5 tons62.2(50 is the typical model of its size class)DXH09PSK3IHwith ductless indoor unit DHH09PUK3IH9 of 9 models qualify · AHRI 216011755No models in this size class
Non-ducted, 2 tons67.5(50 is the typical model of its size class)DXH24FMK3IH3 of 3 models qualify · AHRI 215746296No models in this size class
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class)DXH36FMK3IH4 of 4 models qualify · AHRI 215746298No models in this size class
Non-ducted, 3.5–4.5 tons66.5(50 is the typical model of its size class)DXH42FMK3IH1 of 1 models qualify · AHRI 215746299No 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 typeAIRTEMPAll-around score, best modelDiamondAirAll-around score, best model
Ducted, up to 1.5 tons48.6(50 is the typical model of its size class)DXH18FMK3IH2 of 2 models have all five ratings · AHRI 215746300None on this board (0 of 1 models have all five ratings)
Ducted, 2 tons72.4(50 is the typical model of its size class)UXH24-36MSK3IHwith ducted air handler UMD24MSK3IH7 of 7 models have all five ratings · AHRI 217138202None on this board (0 of 1 models have all five ratings)
Ducted, 2.5–3 tons61.6(50 is the typical model of its size class)DXH30FMK3IH11 of 11 models have all five ratings · AHRI 215746303None on this board (0 of 3 models have all five ratings)
Ducted, 3.5–4.5 tons83.1(50 is the typical model of its size class)UXH48-60MSK3IHwith ducted air handler UMD48MSK3IH14 of 14 models have all five ratings · AHRI 217138204None on this board (0 of 2 models have all five ratings)
Ducted, 5 tons and up17.9(50 is the typical model of its size class)RHPXYB060AJT1 of 1 models have all five ratings · AHRI 217608143No models in this size class
Non-ducted, up to 1.5 tons78.0(50 is the typical model of its size class)DXH09PSK3IHwith ductless indoor unit DHH09PUK3IH9 of 9 models have all five ratings · AHRI 216011755No models in this size class
Non-ducted, 2 tons72.2(50 is the typical model of its size class)DXH24PSK3IHwith ductless indoor unit DHH24PUK3IH3 of 3 models have all five ratings · AHRI 216011759No models in this size class
Non-ducted, 2.5–3 tons70.5(50 is the typical model of its size class)DXH30FMK3IH4 of 4 models have all five ratings · AHRI 215746297No models in this size class
Non-ducted, 3.5–4.5 tons67.7(50 is the typical model of its size class)DXH42FMK3IH1 of 1 models have all five ratings · AHRI 215746299No 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
RatingAIRTEMPDiamondAir
COP at 5°Fbeats 88% · 2.10DXH36FMK3IHNon-ducted, 2.5–3 tons—
Capacity retention at 5°Fbeats 99% · 114%UXH48-60MSK3IHDucted, 3.5–4.5 tons—
HSPF2beats 90% · 10.5UXH48-60MSK3IHDucted, 3.5–4.5 tonsbeats 27% · 7.5D1448HCL32ADucted, 3.5–4.5 tons
SEER2beats 97% · 26.0DXH24PSK3IHNon-ducted, 2 tonsbeats 22% · 14.3D1448HCL32ADucted, 3.5–4.5 tons
EER2beats 94% · 13.0DXH42FMK3IHNon-ducted, 3.5–4.5 tonsbeats 67% · 11.7D1448HCL32ADucted, 3.5–4.5 tons
Heating capacity at 5°Fbeats 98% · 54,000 Btu/hUXH48-60MSK3IHDucted, 3.5–4.5 tons—

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