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ENVIAIR vs Everwell heat pumps

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

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingENVIAIREverwell
Efficiency index53% (higher)median —27% (higher)median —
COP at 5°F44% (higher)median 1.8337% (higher)median 1.93
Capacity retention at 5°F60% (higher)median 85%20% (higher)median 54%
HSPF242% (higher)median 8.828% (higher)median 8.0
SEER257% (higher)median 20.026% (higher)median 15.7
EER257% (higher)median 12.030% (higher)median 10.9
Heating capacity at 5°F62% (higher)median 16,850 Btu/h28% (higher)median 11,050 Btu/h
Outdoor models1414
AHRI certifications2033

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardENVIAIREverwell
CEE 2025 Tier 1 (Split ASHP)85.7%12 models14.3%2 models
CEE 2026 Tier 1 (Split ASHP)85.7%12 models14.3%2 models
CEE Advanced Tier (Split ASHP)14.3%2 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)85.7%12 models14.3%2 models
DOE Cold Climate Heat Pump Challenge14.3%2 models0%0 models
ENERGY STAR Cold Climate0%0 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 · 5 groups where both have models
  • ENVIAIR
  • Everwell
  • 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 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 typeENVIAIREverwell
Ducted, 2.5–3 tons2 · index 52%4 · index 43%
Ducted, 3.5–4.5 tons3 · index 60%3 · index —
Ducted, up to 1.5 tonsNone1 · index 22%
Ducted, 2 tonsNone1 · index 25%
Non-ducted, up to 1.5 tons7 · index 51%3 · index 13%
Non-ducted, 2 tons2 · index 51%1 · index —
Non-ducted, 2.5–3 tons1 · index 65%1 · index 8%
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 modelEverwellCold-climate score, best model
Ducted, up to 1.5 tonsNo models in this size classNone on this board (0 of 1 models qualify)
Ducted, 2 tonsNo models in this size classNone on this board (0 of 1 models qualify)
Ducted, 2.5–3 tons52.5(50 is the typical model of its size class)EMSO21M36ZE230A2 of 2 models qualify · AHRI 21847237557.0(50 is the typical model of its size class) (higher)EPKH03625HA-18Also listed as EPKH03625HA-182 of 4 models qualify · AHRI 217508977
Ducted, 3.5–4.5 tons63.1(50 is the typical model of its size class)ECSO19A60FLU230Awith ducted air handler ESCI19A-C60FL230A2 of 3 models qualify · AHRI 218471537None on this board (0 of 3 models qualify)
Non-ducted, up to 1.5 tons87.2(50 is the typical model of its size class)EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230A7 of 7 models qualify · AHRI 218472370None on this board (0 of 3 models qualify)
Non-ducted, 2 tons60.1(50 is the typical model of its size class)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models qualify · AHRI 218472372None on this board (0 of 1 models qualify)
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class)EMSO21M36ZE230A1 of 1 models qualify · AHRI 218472374None on this board (0 of 1 models qualify)
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 modelEverwellAll-around score, best model
Ducted, up to 1.5 tonsNo models in this size class22.4(50 is the typical model of its size class)CAC1814HA15with ducted air handler A(E,F)W18J+TDR1 of 1 models have all five ratings · AHRI 218806265
Ducted, 2 tonsNo models in this size class25.1(50 is the typical model of its size class)CAC2414HA15with ducted air handler L(E,F)W30CJ1 of 1 models have all five ratings · AHRI 218806266
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 21847237553.0(50 is the typical model of its size class)EPKH03625HA-18Also listed as EPKH03625HA-184 of 4 models have all five ratings · AHRI 217508977
Ducted, 3.5–4.5 tons67.6(50 is the typical model of its size class)EMSO21M60ZE230A3 of 3 models have all five ratings · AHRI 218472381None on this board (0 of 3 models have all five ratings)
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 21847237022.1(50 is the typical model of its size class)MKTH1215C-17with ductless indoor unit MKTH1215E-173 of 3 models have all five ratings · AHRI 217500261
Non-ducted, 2 tons78.1(50 is the typical model of its size class)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models have all five ratings · AHRI 218472372None on this board (0 of 1 models have all five ratings)
Non-ducted, 2.5–3 tons64.5(50 is the typical model of its size class) (higher)EMSO21M36ZE230A1 of 1 models have all five ratings · AHRI 2184723747.6(50 is the typical model of its size class)MKTH3625C-17*with ductless indoor unit MKTH3625E-171 of 1 models have all five ratings · AHRI 217730057
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
RatingENVIAIREverwell
COP at 5°Fbeats 96% · 2.20EMSO21M60ZE230ANon-ducted, 3.5–4.5 tonsbeats 56% · 2.00EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
Capacity retention at 5°Fbeats 94% · 100%EMSO27S24AY230ANon-ducted, 2 tonsbeats 56% · 73%EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
HSPF2beats 87% · 11.2EMSO30S9AY230ANon-ducted, up to 1.5 tonsbeats 53% · 8.5EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
SEER2beats 99% · 27.0EMSO27S24AY230ANon-ducted, 2 tonsbeats 74% · 18.5EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
EER2beats 98% · 16.8EMSO30S9AY230ANon-ducted, up to 1.5 tonsbeats 54% · 11.4CAC4214HA15Ducted, 3.5–4.5 tons
Heating capacity at 5°Fbeats 98% · 54,000 Btu/hECSO19A60FLU230ADucted, 3.5–4.5 tonsbeats 63% · 26,400 Btu/hEPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons

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