Everwell heat pump efficiency: 14 outdoor models compared

Everwell has 14 heat pump outdoor models certified with this refrigerant group, in 33 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes Everwell makes. Everwell has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

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ManufacturerData as of Oct 9, 2026updated Oct 10, 2026 · sources

Outdoor models: 14
AHRI certifications: 33
Efficiency index: 27%; Typical model vs same-size, same-type peers (10 models)
Meet CEE 2025: 14.3%; 2 models

How Everwell compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.

Everwell against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Everwell’s own modelsEverwell is strongest on COP at 5°F (its typical model beats 37% of comparable models) and weakest on capacity retention at 5°F (20%).

Everwell
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of Everwell’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index10 models scored	27%	Not ranked	—
COP at 5°F10 models scored	37%	Not ranked	1.93
Capacity retention at 5°F10 models scored	20%	Not ranked	54%
HSPF214 models scored	28%	Not ranked	8.0
SEER214 models scored	26%	Not ranked	15.7
EER214 models scored	30%	Not ranked	10.9
Heating capacity at 5°F10 models scored	28%	Not ranked	11,050 Btu/h

Standards met

Share of Everwell’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	14.3%	2
CEE 2026 Tier 1 (Split ASHP)	14.3%	2
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	14.3%	2
DOE Cold Climate Heat Pump Challenge	0%	0
ENERGY STAR Cold Climate	0%	0

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.

Everwell’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line

Everwell (median, middle 50%, 10th–90th)
All models of the group

Source: AHRI Directory · as of Oct 9, 2026

Share of comparable models beaten, per peer group
Size and duct type	Models	Index	COP@5°F	HSPF2	SEER2
Ducted, up to 1.5 tons	1	22%	33%	14%	22%
Ducted, 2 tons	1	25%	42%	21%	15%
Ducted, 2.5–3 tons	4	43%	56%	42%	48%
Ducted, 3.5–4.5 tons	3	—	—	30%	24%
Non-ducted, up to 1.5 tons	3	13%	22%	22%	8%
Non-ducted, 2 tons	1	—	—	12%	36%
Non-ducted, 2.5–3 tons	1	8%	7%	12%	3%

Every Everwell model in the market

Everwell’s 14 models with a known size and duct type, over the shape of the whole catalog.

Everwell models by size and ratingColoured: Everwell · grey shapes: all 14,508 models · lines: catalog medians by size

Everwell models
Ducted median by size
Non-ducted median by size
Every model at each size (width = count)
Standard threshold

Dots: 14 everwell models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 models, half a ton at a time.

Show the data as a table

COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, size	Models	10th pct.	25th	Median	75th	90th
Ducted, 0.5 tons	826	1.64	1.71	1.75	1.85	2.24
Ducted, 1 ton	407	1.80	1.90	2.05	2.41	2.45
Ducted, 1.5 tons	992	1.75	1.86	2.00	2.17	2.40
Ducted, 2 tons	999	1.75	1.86	2.00	2.18	2.30
Ducted, 2.5 tons	1,040	1.70	1.80	2.00	2.10	2.36
Ducted, 3 tons	696	1.80	1.90	2.00	2.10	2.42
Ducted, 3.5 tons	864	1.70	1.80	2.00	2.10	2.46
Ducted, 4 tons	727	1.80	1.86	2.00	2.12	2.40
Ducted, 4.5 tons	690	1.70	1.80	1.90	2.10	2.20
Ducted, 5 tons	86	1.89	2.00	2.10	2.10	2.10
Non-ducted, 0.5 tons	1,186	1.75	1.80	1.90	2.00	2.22
Non-ducted, 1 ton	1,343	1.80	1.80	1.99	2.10	2.21
Non-ducted, 1.5 tons	1,261	1.80	1.80	2.00	2.10	2.31
Non-ducted, 2 tons	761	1.80	1.98	2.00	2.10	2.30
Non-ducted, 2.5 tons	403	1.80	1.85	2.00	2.00	2.10
Non-ducted, 3 tons	473	1.90	1.98	2.00	2.03	2.20
Non-ducted, 3.5 tons	280	2.00	2.00	2.00	2.05	2.10
Non-ducted, 4 tons	204	1.96	2.00	2.05	2.10	2.11
Non-ducted, 4.5 tons	78	1.90	1.91	1.95	2.01	2.01
Non-ducted, 5 tons	84	1.99	2.00	2.05	2.20	2.20

Source: AHRI Directory · as of Oct 9, 2026

Top Everwell models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 1 Everwell cold-climate picks across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	Btu/h @5°F	SEER2	Meets	Combos	AHRI ref.	Compared with	Score
1EPKH03625HA-18Everwell · Roof TopAlso listed as EPKH03625HA-18	3 tons36,000 Btu/h · Ducted	73%	2.00	8.5	26,400	18.5	CEE 25CEE 26Xcel	1	217508977	Ducted, 2.5–3 tons	57.0

All-around best

Top 5 Everwell models on the all-around score across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	SEER2	EER2	Meets	Combos	AHRI ref.	Compared with	Score	Heating half	Cooling half	Cold-climate score
1EPKH03625HA-18Everwell · Roof TopAlso listed as EPKH03625HA-18	3 tons36,000 Btu/h · Ducted	73%	2.00	8.5	18.5	10.6	CEE 25CEE 26Xcel	1	217508977	Ducted, 2.5–3 tons	53.0	57.0	49.0	57.0
2CAC3614HA15Everwellwith ducted air handler L(E,F)W36DJ	2.5 tons32,800 Btu/h · Ducted	49%	2.00	7.5	14.3	11.4	None	5	218806269	Ducted, 2.5–3 tons	34.1	34.8	33.4	Not a pick
3CAC3014HA15Everwellwith ducted air handler L(E,F)W30EJ	2.5 tons28,200 Btu/h · Ducted	46%	2.00	7.5	14.3	11.4	None	8	218806267	Ducted, 2.5–3 tons	33.4	33.4	33.4	Not a pick
4CAC2414HA15Everwellwith ducted air handler L(E,F)W30CJ	2 tons22,000 Btu/h · Ducted	47%	1.96	7.5	14.3	11.2	None	5	218806266	Ducted, 2 tons	25.1	25.5	24.7	Not a pick
5CAC1814HA15Everwellwith ducted air handler A(E,F)W18J+TDR	1.5 tons17,100 Btu/h · Ducted	42%	1.78	7.5	14.3	11.4	None	5	218806265	Ducted, up to 1.5 tons	22.4	15.8	28.9	Not a pick

Best model on each rating

Everwell’s model with the highest peer percentile on each rating, ranked by that one rating only
Rating	Model	Value	Compared with	Beats	AHRI ref.
COP at 5°F	EPKH03625HA-18Also listed as EPKH03625HA-18	2.00	Ducted, 2.5–3 tons	56%	217508977
Capacity retention at 5°F	EPKH03625HA-18Also listed as EPKH03625HA-18	73%	Ducted, 2.5–3 tons	56%	217508977
HSPF2	EPKH03625HA-18Also listed as EPKH03625HA-18	8.5	Ducted, 2.5–3 tons	53%	217508977
SEER2	EPKH03625HA-18Also listed as EPKH03625HA-18	18.5	Ducted, 2.5–3 tons	74%	217508977
EER2	CAC4214HA15	11.4	Ducted, 3.5–4.5 tons	54%	216604732
Heating capacity at 5°F	EPKH03625HA-18Also listed as EPKH03625HA-18	26,400 Btu/h	Ducted, 2.5–3 tons	63%	217508977

All 14 Everwell models in Explore

Everwell size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.

Everwell: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct type	Cold-climate pickCold-climate score, best model	All-around bestAll-around score, best model
Ducted, up to 1.5 tons	None on this board (0 of 1 models qualify)	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	None on this board (0 of 1 models qualify)	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	57.0(50 is the typical model of its size class)EPKH03625HA-18Also listed as EPKH03625HA-182 of 4 models qualify · AHRI 217508977	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	None on this board (0 of 3 models qualify)	None on this board (0 of 3 models have all five ratings)
Non-ducted, up to 1.5 tons	None on this board (0 of 3 models qualify)	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	None on this board (0 of 1 models qualify)	None on this board (0 of 1 models have all five ratings)
Non-ducted, 2.5–3 tons	None on this board (0 of 1 models qualify)	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

Newest Everwell certifications

By AHRI reference number; AHRI issues references in increasing order.

The 5 most recently certified Everwell outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
CAC3614HA15Everwellwith ducted air handler L(E,F)W36DK	2.5 tons32,800 Btu/h · Ducted	2.00	49%	7.5	14.3	None	5	218814747
CAC3014HA15Everwellwith ducted air handler L(E,F)W36DK	2.5 tons27,600 Btu/h · Ducted	2.00	46%	7.5	14.3	None	8	218814746
CAC2414HA15Everwellwith ducted air handler L(E,F)W30CK	2 tons22,000 Btu/h · Ducted	1.96	47%	7.5	14.3	None	5	218814744
CAC1814HA15Everwellwith ducted air handler A(E,F)W18K+TDR	1.5 tons17,100 Btu/h · Ducted	1.78	42%	7.5	14.3	None	5	218814743
EPKH03625HA-18*Everwell · Roof Top	3 tons36,000 Btu/h · Ducted	2.00	73%	8.5	18.5	CEE 25CEE 26Xcel	1	218679244

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Everwell includes these brand names as listed in AHRI: Everwell. Standards are checked against published thresholds; program rules beyond ratings are not checked.