Comfort Kool heat pump efficiency: 3 outdoor models compared

Comfort Kool has 3 heat pump outdoor models certified with this refrigerant group, in 3 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 Comfort Kool makes. Comfort Kool has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of Oct 11, 2026updated Oct 11, 2026 · sources

Outdoor models: 3
AHRI certifications: 3
Efficiency index: 34%; Typical model vs same-size, same-type peers (3 models)
Meet CEE 2025: 100%; 3 models

How Comfort Kool 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.

Comfort Kool against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Comfort Kool’s own modelsComfort Kool is strongest on HSPF2 (its typical model beats 45% of comparable models) and weakest on EER2 (22%).

Comfort Kool
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of Comfort Kool’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index3 models scored	34%	Not ranked	—
COP at 5°F3 models scored	36%	Not ranked	1.80
Capacity retention at 5°F3 models scored	27%	Not ranked	69%
HSPF23 models scored	45%	Not ranked	9.5
SEER23 models scored	41%	Not ranked	21.0
EER23 models scored	22%	Not ranked	10.5
Heating capacity at 5°F3 models scored	44%	Not ranked	12,500 Btu/h

Standards met

Share of Comfort Kool’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	100%	3
CEE 2026 Tier 1 (Split ASHP)	100%	3
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	33.3%	1
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.

Comfort Kool’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

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

Source: AHRI Directory · as of Oct 11, 2026

Share of comparable models beaten, per peer group
Size and duct type	Models	Index	COP@5°F	HSPF2	SEER2
Non-ducted, up to 1.5 tons	2	31%	19%	46%	37%
Non-ducted, 2 tons	1	39%	71%	44%	49%

Every Comfort Kool model in the market

Comfort Kool’s 3 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 3 comfort kool 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	865	1.70	1.80	2.00	2.10	2.46
Ducted, 4 tons	726	1.80	1.86	2.00	2.12	2.41
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 11, 2026

Top Comfort Kool 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 Comfort Kool 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
1MCKA12K01CComfort Koolwith ductless indoor unit MCKA12K01E	1 ton12,000 Btu/h · Non-ducted	75%	1.80	9.5	9,000	20.0	CEE 25CEE 26Xcel	1	217477891	Non-ducted, up to 1.5 tons	37.6

All-around best

Top 3 Comfort Kool 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
1MCKA24K02CComfort Koolwith ductless indoor unit MCKA24K02E	2 tons24,000 Btu/h · Non-ducted	65%	2.10	9.5	21.0	10.5	CEE 25CEE 26	1	217477893	Non-ducted, 2 tons	39.1	43.2	35.0	Not a pick
2MCKA12K01CComfort Koolwith ductless indoor unit MCKA12K01E	1 ton12,000 Btu/h · Non-ducted	75%	1.80	9.5	20.0	10.5	CEE 25CEE 26Xcel	1	217477891	Non-ducted, up to 1.5 tons	32.2	37.6	26.7	37.6
3MCKA18K02CComfort Koolwith ductless indoor unit MCKA18K02E	1.5 tons18,000 Btu/h · Non-ducted	69%	1.80	9.5	21.0	10.5	CEE 25CEE 26	1	217477892	Non-ducted, up to 1.5 tons	30.7	28.0	33.5	Not a pick

Best model on each rating

Comfort Kool’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	MCKA24K02C	2.10	Non-ducted, 2 tons	71%	217477893
Capacity retention at 5°F	MCKA12K01C	75%	Non-ducted, up to 1.5 tons	47%	217477891
HSPF2	MCKA12K01C	9.5	Non-ducted, up to 1.5 tons	45%	217477891
SEER2	MCKA24K02C	21.0	Non-ducted, 2 tons	47%	217477893
EER2	MCKA12K01C	10.5	Non-ducted, up to 1.5 tons	23%	217477891
Heating capacity at 5°F	MCKA18K02C	12,500 Btu/h	Non-ducted, up to 1.5 tons	72%	217477892

All 3 Comfort Kool models in Explore

Comfort Kool 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.

Comfort Kool: 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
Non-ducted, up to 1.5 tons	37.6(50 is the typical model of its size class)MCKA12K01Cwith ductless indoor unit MCKA12K01E1 of 2 models qualify · AHRI 217477891	32.2(50 is the typical model of its size class)MCKA12K01Cwith ductless indoor unit MCKA12K01E2 of 2 models have all five ratings · AHRI 217477891
Non-ducted, 2 tons	None on this board (0 of 1 models qualify)	39.1(50 is the typical model of its size class)MCKA24K02Cwith ductless indoor unit MCKA24K02E1 of 1 models have all five ratings · AHRI 217477893

All-around board, every manufacturer

Newest Comfort Kool certifications

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

The 3 most recently certified Comfort Kool outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
MCKA24K02CComfort Koolwith ductless indoor unit MCKA24K02E	2 tons24,000 Btu/h · Non-ducted	2.10	65%	9.5	21.0	CEE 25CEE 26	1	217477893
MCKA18K02CComfort Koolwith ductless indoor unit MCKA18K02E	1.5 tons18,000 Btu/h · Non-ducted	1.80	69%	9.5	21.0	CEE 25CEE 26	1	217477892
MCKA12K01CComfort Koolwith ductless indoor unit MCKA12K01E	1 ton12,000 Btu/h · Non-ducted	1.80	75%	9.5	20.0	CEE 25CEE 26Xcel	1	217477891

Shares hardware with

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

No shared hardware found for Comfort Kool in this group.

Compare Comfort Kool

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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