Enerwave vs Everwell heat pumps

Measured against models of the same size and duct type, Everwell scores higher on 4 of the 6 ratings. Enerwave has 14 outdoor models, Everwell has 14 outdoor models. Enerwave and Everwell have no QMID on file and are not ranked.

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CompareData as of Oct 9, 2026updated Oct 10, 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 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, Everwell scores higher on 4 of the 6 ratings.

Enerwave
Everwell
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Enerwave	Everwell
Efficiency index	22%median —	27%median —
COP at 5°F	17%median 1.71	37%median 1.93
Capacity retention at 5°F	31% (higher)median 72%	20% (higher)median 54%
HSPF2	36% (higher)median 9.2	28% (higher)median 8.0
SEER2	18%median 13.9	26%median 15.7
EER2	15%median 10.6	30%median 10.9
Heating capacity at 5°F	10%median 5,900 Btu/h	28%median 11,050 Btu/h
Outdoor models	14	14
AHRI certifications	14	33

Share of models meeting each standard

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

Enerwave
Everwell
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 9, 2026

Models per peer group · efficiency index within the group
Size and duct type	Enerwave	Everwell
Ducted, up to 1.5 tons	14 · index 22%	1 · index 22%
Ducted, 2 tons	None	1 · index 25%
Ducted, 2.5–3 tons	None	4 · index 43%
Ducted, 3.5–4.5 tons	None	3 · index —
Non-ducted, up to 1.5 tons	None	3 · index 13%
Non-ducted, 2 tons	None	1 · index —
Non-ducted, 2.5–3 tons	None	1 · index 8%

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	EverwellCold-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	None on this board (0 of 1 models qualify)
Ducted, 2 tons	No models in this size class	None on this board (0 of 1 models qualify)
Ducted, 2.5–3 tons	No models in this size class	57.0(50 is the typical model of its size class)EPKH03625HA-18Also listed as EPKH03625HA-182 of 4 models qualify · AHRI 217508977
Ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 3 models qualify)
Non-ducted, up to 1.5 tons	No models in this size class	None on this board (0 of 3 models qualify)
Non-ducted, 2 tons	No models in this size class	None on this board (0 of 1 models qualify)
Non-ducted, 2.5–3 tons	No models in this size class	None on this board (0 of 1 models qualify)

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	EverwellAll-around score, best model
Ducted, up to 1.5 tons	46.5(50 is the typical model of its size class) (higher)W2SH06AEW14 of 14 models have all five ratings · AHRI 218418648	22.4(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 tons	No models in this size class	25.1(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 tons	No models in this size class	53.0(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 tons	No models in this size class	None on this board (0 of 3 models have all five ratings)
Non-ducted, up to 1.5 tons	No models in this size class	22.1(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 tons	No models in this size class	None on this board (0 of 1 models have all five ratings)
Non-ducted, 2.5–3 tons	No models in this size class	7.6(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

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	Everwell
COP at 5°F	beats 79% · 2.16W2SH06AEWDucted, up to 1.5 tons	beats 56% · 2.00EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
Capacity retention at 5°F	beats 44% · 73%VD3SD18EWAlso listed as VD3SD27EWDucted, up to 1.5 tons	beats 56% · 73%EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
HSPF2	beats 97% · 12.6W2SH06AEWDucted, up to 1.5 tons	beats 53% · 8.5EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
SEER2	beats 46% · 15.8W3PHEF8BEWDucted, up to 1.5 tons	beats 74% · 18.5EPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons
EER2	beats 31% · 11.2W3PHEF8BEWDucted, up to 1.5 tons	beats 54% · 11.4CAC4214HA15Ducted, 3.5–4.5 tons
Heating capacity at 5°F	beats 22% · 6,500 Btu/hVD3SD18EWAlso listed as VD3SD27EWDucted, up to 1.5 tons	beats 63% · 26,400 Btu/hEPKH03625HA-18Also listed as EPKH03625HA-18Ducted, 2.5–3 tons

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