Everwell heat pump efficiency: 27 outdoor models compared

Everwell has 27 heat pump outdoor models certified with this refrigerant group, in 31 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: 27
AHRI certifications: 31
Efficiency index: 14%; Typical model vs same-size, same-type peers (1 model)
Meet CEE 2025: 0%; 0 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 heating capacity at 5°F (its typical model beats 62% of comparable models) and weakest on HSPF2 (16%).

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 index1 model scored	14%	Not ranked	—
COP at 5°F1 model scored	22%	Not ranked	1.80
Capacity retention at 5°F1 model scored	16%	Not ranked	61%
HSPF227 models scored	16%	Not ranked	7.8
SEER227 models scored	22%	Not ranked	17.0
EER227 models scored	27%	Not ranked	10.0
Heating capacity at 5°F1 model scored	62%	Not ranked	11,600 Btu/h

Standards met

Share of Everwell’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	0%	0
CEE 2026 Tier 1 (Split ASHP)	0%	0
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	0%	0
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	—	—	12%	10%
Ducted, 2 tons	2	—	—	34%	30%
Ducted, 2.5–3 tons	3	—	—	31%	29%
Ducted, 3.5–4.5 tons	5	—	—	35%	40%
Non-ducted, up to 1.5 tons	10	14%	22%	4%	18%
Non-ducted, 2 tons	2	—	—	5%	13%
Non-ducted, 2.5–3 tons	4	—	—	5%	9%

Every Everwell model in the market

Everwell’s 27 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 11,475 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: 27 everwell models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 11,475 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	175	1.70	1.85	1.90	2.10	2.26
Ducted, 1 ton	340	1.85	1.90	2.00	2.40	2.65
Ducted, 1.5 tons	789	1.75	1.85	2.00	2.20	2.55
Ducted, 2 tons	782	1.73	1.80	2.00	2.10	2.33
Ducted, 2.5 tons	735	1.71	1.80	1.90	2.09	2.48
Ducted, 3 tons	652	1.68	1.70	1.90	2.06	2.36
Ducted, 3.5 tons	641	1.61	1.80	1.95	2.20	2.50
Ducted, 4 tons	367	1.70	1.80	1.91	2.02	2.52
Ducted, 4.5 tons	544	1.70	1.80	1.91	2.08	2.34
Ducted, 5 tons	25	1.80	1.80	1.90	1.90	2.15
Non-ducted, 0.5 tons	717	1.75	1.81	1.97	2.10	2.19
Non-ducted, 1 ton	1,064	1.75	1.80	1.90	2.07	2.25
Non-ducted, 1.5 tons	886	1.80	1.80	1.87	2.07	2.21
Non-ducted, 2 tons	564	1.80	1.80	1.83	2.04	2.21
Non-ducted, 2.5 tons	275	1.80	1.81	1.84	1.86	2.03
Non-ducted, 3 tons	502	1.80	1.80	1.90	2.00	2.09
Non-ducted, 3.5 tons	70	1.82	1.83	1.90	2.00	2.28
Non-ducted, 4 tons	263	1.80	1.80	1.98	2.00	2.10
Non-ducted, 4.5 tons	103	1.77	1.77	1.80	1.97	2.02
Non-ducted, 5 tons	29	1.98	2.00	2.10	2.30	2.47

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

No Everwell model keeps at least 70% of its heat at 5°F with all three cold-climate ratings.

All-around best

Top 1 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
1MGTH1823C-20EVERWELLwith ductless indoor unit MGTH1823E-20	1.5 tons18,000 Btu/h · Non-ducted	61%	1.80	7.8	19.0	9.0	None	1	205415927	Non-ducted, up to 1.5 tons	14.2	13.4	14.9	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	MGTH1823C-20	1.80	Non-ducted, up to 1.5 tons	22%	205415927
Capacity retention at 5°F	MGTH1823C-20	61%	Non-ducted, up to 1.5 tons	16%	205415927
HSPF2	CAC4813H18	8.1	Ducted, 3.5–4.5 tons	49%	206860160
SEER2	CAC4813H18	16.0	Ducted, 3.5–4.5 tons	65%	206860160
EER2	CAC2413H18	12.2	Ducted, 2 tons	76%	206860158
Heating capacity at 5°F	MGTH1823C-20	11,600 Btu/h	Non-ducted, up to 1.5 tons	61%	205415927

All 27 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)	None on this board (0 of 1 models have all five ratings)
Ducted, 2 tons	None on this board (0 of 2 models qualify)	None on this board (0 of 2 models have all five ratings)
Ducted, 2.5–3 tons	None on this board (0 of 3 models qualify)	None on this board (0 of 3 models have all five ratings)
Ducted, 3.5–4.5 tons	None on this board (0 of 5 models qualify)	None on this board (0 of 5 models have all five ratings)
Non-ducted, up to 1.5 tons	None on this board (0 of 10 models qualify)	14.2(50 is the typical model of its size class)MGTH1823C-20with ductless indoor unit MGTH1823E-201 of 10 models have all five ratings · AHRI 205415927
Non-ducted, 2 tons	None on this board (0 of 2 models qualify)	None on this board (0 of 2 models have all five ratings)
Non-ducted, 2.5–3 tons	None on this board (0 of 4 models qualify)	None on this board (0 of 4 models have all five ratings)

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.
MKTH2423C-16EVERWELLwith ductless indoor unit MKTH2423E-16	2 tons22,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	213352678
MKTH1823C-16EVERWELLwith ductless indoor unit MKTH1823E-16	1.5 tons16,500 Btu/h · Non-ducted	—	—	8.5	17.0	None	1	213352677
MKTH1223C-16EVERWELLwith ductless indoor unit MKTH1223E-16	1 ton11,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	213352676
MKTH1213C-16EVERWELLwith ductless indoor unit MKTH1213E-16	1 ton11,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	213352675
CAC6013HA15Everwellwith ducted air handler AHC60HA15	4.5 tons56,000 Btu/h · Ducted	—	—	7.5	14.3	None	1	212367473

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

No shared hardware found for Everwell in this group.

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Manufacturers of a similar size, side by side.

Compare with any manufacturer

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