Enerwave vs ENVIAIR heat pumps

Measured against models of the same size and duct type, ENVIAIR scores higher on 6 of the 6 ratings. Enerwave has 14 outdoor models, ENVIAIR has 14 outdoor models. Enerwave and ENVIAIR have no QMID on file and are not ranked.

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CompareData as of Oct 11, 2026updated Oct 11, 2026 · 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.

Enerwave and ENVIAIR 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.

Enerwave
ENVIAIR
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Enerwave	ENVIAIR
Efficiency index	22%median —	53%median —
COP at 5°F	17%median 1.71	44%median 1.83
Capacity retention at 5°F	31%median 72%	60%median 85%
HSPF2	36%median 9.2	42%median 8.8
SEER2	18%median 13.9	57%median 20.0
EER2	15%median 10.6	57%median 12.0
Heating capacity at 5°F	10%median 5,900 Btu/h	62%median 16,850 Btu/h
Outdoor models	14	14
AHRI certifications	14	20

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Enerwave	ENVIAIR
CEE 2025 Tier 1 (Split ASHP)	0%0 models	85.7%12 models
CEE 2026 Tier 1 (Split ASHP)	0%0 models	85.7%12 models
CEE Advanced Tier (Split ASHP)	0%0 models	14.3%2 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	85.7%12 models
DOE Cold Climate Heat Pump Challenge	0%0 models	14.3%2 models
ENERGY STAR Cold Climate	0%0 models	0%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 · 0 groups where both have models

Enerwave
ENVIAIR
All models of the group

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

Source: AHRI Directory · as of Oct 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	Enerwave	ENVIAIR
Ducted, up to 1.5 tons	14 · index 22%	None
Ducted, 2.5–3 tons	None	2 · index 52%
Ducted, 3.5–4.5 tons	None	3 · index 60%
Non-ducted, up to 1.5 tons	None	7 · index 51%
Non-ducted, 2 tons	None	2 · index 51%
Non-ducted, 2.5–3 tons	None	1 · index 65%
Non-ducted, 3.5–4.5 tons	None	2 · index 46%

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 type	EnerwaveCold-climate score, best model	ENVIAIRCold-climate score, best model
Ducted, up to 1.5 tons	43.8(50 is the typical model of its size class)VD3SD18EWAlso listed as VD3SD27EW12 of 14 models qualify · AHRI 218418644	No models in this size class
Ducted, 2.5–3 tons	No models in this size class	52.5(50 is the typical model of its size class)EMSO21M36ZE230A2 of 2 models qualify · AHRI 218472375
Ducted, 3.5–4.5 tons	No models in this size class	63.1(50 is the typical model of its size class)ECSO19A60FLU230Awith ducted air handler ESCI19A-C60FL230A2 of 3 models qualify · AHRI 218471537
Non-ducted, up to 1.5 tons	No models in this size class	87.2(50 is the typical model of its size class)EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230A7 of 7 models qualify · AHRI 218472370
Non-ducted, 2 tons	No models in this size class	60.1(50 is the typical model of its size class)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models qualify · AHRI 218472372
Non-ducted, 2.5–3 tons	No models in this size class	77.2(50 is the typical model of its size class)EMSO21M36ZE230A1 of 1 models qualify · AHRI 218472374
Non-ducted, 3.5–4.5 tons	No models in this size class	54.8(50 is the typical model of its size class)EMSO21M48ZE230A1 of 2 models qualify · AHRI 218472377

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 type	EnerwaveAll-around score, best model	ENVIAIRAll-around score, best model
Ducted, up to 1.5 tons	46.5(50 is the typical model of its size class)W2SH06AEW14 of 14 models have all five ratings · AHRI 218418648	No models in this size class
Ducted, 2.5–3 tons	No models in this size class	59.1(50 is the typical model of its size class)EMSO21M36ZE230A2 of 2 models have all five ratings · AHRI 218472375
Ducted, 3.5–4.5 tons	No models in this size class	67.6(50 is the typical model of its size class)EMSO21M60ZE230A3 of 3 models have all five ratings · AHRI 218472381
Non-ducted, up to 1.5 tons	No models in this size class	92.6(50 is the typical model of its size class)EMSO30S9AY230Awith ductless indoor unit EMSI30S9AY230A7 of 7 models have all five ratings · AHRI 218472370
Non-ducted, 2 tons	No models in this size class	78.1(50 is the typical model of its size class)EMSO27S24AY230Awith ductless indoor unit EMSI27S24AY230A2 of 2 models have all five ratings · AHRI 218472372
Non-ducted, 2.5–3 tons	No models in this size class	64.5(50 is the typical model of its size class)EMSO21M36ZE230A1 of 1 models have all five ratings · AHRI 218472374
Non-ducted, 3.5–4.5 tons	No models in this size class	55.5(50 is the typical model of its size class)EMSO21M48ZE230A2 of 2 models have all five ratings · AHRI 218472377

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
Rating	Enerwave	ENVIAIR
COP at 5°F	beats 79% · 2.16W2SH06AEWDucted, up to 1.5 tons	beats 96% · 2.20EMSO21M60ZE230ANon-ducted, 3.5–4.5 tons
Capacity retention at 5°F	beats 44% · 73%VD3SD18EWAlso listed as VD3SD27EWDucted, up to 1.5 tons	beats 94% · 100%EMSO27S24AY230ANon-ducted, 2 tons
HSPF2	beats 97% · 12.6W2SH06AEWDucted, up to 1.5 tons	beats 87% · 11.2EMSO30S9AY230ANon-ducted, up to 1.5 tons
SEER2	beats 46% · 15.8W3PHEF8BEWDucted, up to 1.5 tons	beats 99% · 27.0EMSO27S24AY230ANon-ducted, 2 tons
EER2	beats 31% · 11.2W3PHEF8BEWDucted, up to 1.5 tons	beats 98% · 16.8EMSO30S9AY230ANon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 22% · 6,500 Btu/hVD3SD18EWAlso listed as VD3SD27EWDucted, up to 1.5 tons	beats 98% · 54,000 Btu/hECSO19A60FLU230ADucted, 3.5–4.5 tons

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