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ENVIAIR vs Hessaire heat pumps

Measured against models of the same size and duct type, ENVIAIR scores higher on 4 of the 6 ratings. ENVIAIR has 14 outdoor models, Hessaire has 14 outdoor models. ENVIAIR and Hessaire 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.
ENVIAIR and Hessaire 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, ENVIAIR scores higher on 4 of the 6 ratings.
  • ENVIAIR
  • Hessaire
  • Other ranked manufacturers
ENVIAIRHessaire

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingENVIAIRHessaire
Efficiency index53% (higher)median —48% (higher)median —
COP at 5°F44%median 1.8349%median 1.97
Capacity retention at 5°F60% (higher)median 85%54% (higher)median 76%
HSPF242%median 8.848%median 9.3
SEER257% (higher)median 20.053% (higher)median 20.5
EER257% (higher)median 12.040% (higher)median 11.5
Heating capacity at 5°F62% (higher)median 16,850 Btu/h54% (higher)median 18,000 Btu/h
Outdoor models1414
AHRI certifications2020

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardENVIAIRHessaire
CEE 2025 Tier 1 (Split ASHP)85.7%12 models92.9%13 models
CEE 2026 Tier 1 (Split ASHP)85.7%12 models78.6%11 models
CEE Advanced Tier (Split ASHP)14.3%2 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)85.7%12 models71.4%10 models
DOE Cold Climate Heat Pump Challenge14.3%2 models0%0 models
ENERGY STAR Cold Climate0%0 models57.1%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 · 5 groups where both have models
  • ENVIAIR
  • Hessaire
  • 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 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 typeENVIAIRHessaire
Ducted, 2.5–3 tons2 · index 52%1 · index 45%
Ducted, 3.5–4.5 tons3 · index 60%2 · index 49%
Ducted, 2 tonsNone1 · index 42%
Non-ducted, up to 1.5 tons7 · index 51%7 · index 48%
Non-ducted, 2 tons2 · index 51%2 · index 47%
Non-ducted, 2.5–3 tons1 · index 65%1 · index 65%
Non-ducted, 3.5–4.5 tons2 · index 46%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 typeENVIAIRCold-climate score, best modelHessaireCold-climate score, best model
Ducted, 2 tonsNo models in this size class52.4(50 is the typical model of its size class)HOC24Bwith ducted air handler HAH24B1 of 1 models qualify · AHRI 217490331
Ducted, 2.5–3 tons52.5(50 is the typical model of its size class)EMSO21M36ZE230A2 of 2 models qualify · AHRI 218472375None on this board (0 of 1 models qualify)
Ducted, 3.5–4.5 tons63.1(50 is the typical model of its size class) (higher)ECSO19A60FLU230Awith ducted air handler ESCI19A-C60FL230A2 of 3 models qualify · AHRI 21847153760.6(50 is the typical model of its size class)HOC48Bwith ducted air handler HAH48B1 of 2 models qualify · AHRI 217490333
Non-ducted, up to 1.5 tons87.2(50 is the typical model of its size class) (higher)EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230A7 of 7 models qualify · AHRI 21847237069.5(50 is the typical model of its size class)HM185 of 7 models qualify · AHRI 214728843
Non-ducted, 2 tons60.1(50 is the typical model of its size class) (higher)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models qualify · AHRI 21847237254.1(50 is the typical model of its size class)H24FB2with ductless indoor unit H24FB2-I2 of 2 models qualify · AHRI 218636280
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class) (higher)EMSO21M36ZE230A1 of 1 models qualify · AHRI 21847237452.6(50 is the typical model of its size class)HM271 of 1 models qualify · AHRI 214728844
Non-ducted, 3.5–4.5 tons54.8(50 is the typical model of its size class)EMSO21M48ZE230A1 of 2 models qualify · AHRI 218472377No 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 typeENVIAIRAll-around score, best modelHessaireAll-around score, best model
Ducted, 2 tonsNo models in this size class42.2(50 is the typical model of its size class)HOC24Bwith ducted air handler HAH24B1 of 1 models have all five ratings · AHRI 217490331
Ducted, 2.5–3 tons59.1(50 is the typical model of its size class) (higher)EMSO21M36ZE230A2 of 2 models have all five ratings · AHRI 21847237544.7(50 is the typical model of its size class)HOC36Bwith ducted air handler HAH36B1 of 1 models have all five ratings · AHRI 217490332
Ducted, 3.5–4.5 tons67.6(50 is the typical model of its size class) (higher)EMSO21M60ZE230A3 of 3 models have all five ratings · AHRI 21847238154.9(50 is the typical model of its size class)HOC48Bwith ducted air handler HAH48B2 of 2 models have all five ratings · AHRI 217490333
Non-ducted, up to 1.5 tons92.6(50 is the typical model of its size class) (higher)EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230A7 of 7 models have all five ratings · AHRI 21847237069.2(50 is the typical model of its size class)HM187 of 7 models have all five ratings · AHRI 214728843
Non-ducted, 2 tons78.1(50 is the typical model of its size class) (higher)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models have all five ratings · AHRI 21847237261.3(50 is the typical model of its size class)H24FB2with ductless indoor unit H24FB2-I2 of 2 models have all five ratings · AHRI 218636280
Non-ducted, 2.5–3 tons64.5(50 is the typical model of its size class)EMSO21M36ZE230A1 of 1 models have all five ratings · AHRI 21847237465.4(50 is the typical model of its size class) (higher)HM271 of 1 models have all five ratings · AHRI 214728844
Non-ducted, 3.5–4.5 tons55.5(50 is the typical model of its size class)EMSO21M48ZE230A2 of 2 models have all five ratings · AHRI 218472377No 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
RatingENVIAIRHessaire
COP at 5°Fbeats 96% · 2.20EMSO21M60ZE230ANon-ducted, 3.5–4.5 tonsbeats 98% · 2.50H18TT2Non-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 94% · 100%EMSO27S24AY230ANon-ducted, 2 tonsbeats 87% · 100%HM18Non-ducted, up to 1.5 tons
HSPF2beats 87% · 11.2EMSO30S9AY230ANon-ducted, up to 1.5 tonsbeats 69% · 9.0HOC48BDucted, 3.5–4.5 tons
SEER2beats 99% · 27.0EMSO27S24AY230ANon-ducted, 2 tonsbeats 76% · 18.0HOC48BDucted, 3.5–4.5 tons
EER2beats 98% · 16.8EMSO30S9AY230ANon-ducted, up to 1.5 tonsbeats 80% · 12.9HM27Non-ducted, 2.5–3 tons
Heating capacity at 5°Fbeats 98% · 54,000 Btu/hECSO19A60FLU230ADucted, 3.5–4.5 tonsbeats 93% · 18,000 Btu/hHM18Non-ducted, up to 1.5 tons

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