CASI0 heat pump efficiency: 5 outdoor models compared

CASI0 has 5 heat pump outdoor models certified with this refrigerant group, in 5 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 CASI0 makes. CASI0 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 11, 2026updated Oct 11, 2026 · sources

Outdoor models: 5
AHRI certifications: 5
Efficiency index: —; No model has all five ratings
Meet CEE 2025: 0%; 0 models

How CASI0 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.

CASI0 against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of CASI0’s own modelsCASI0 is strongest on EER2 (its typical model beats 11% of comparable models) and weakest on HSPF2 (2%).

CASI0
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of CASI0’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index0 models scored	—	Not ranked	—
COP at 5°F0 models scored	—	Not ranked	—
Capacity retention at 5°F0 models scored	—	Not ranked	—
HSPF25 models scored	2%	Not ranked	8.0
SEER25 models scored	6%	Not ranked	17.0
EER25 models scored	11%	Not ranked	9.7
Heating capacity at 5°F0 models scored	—	Not ranked	—

Standards met

Share of CASI0’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.

CASI0’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

CASI0 (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	3	—	—	2%	8%
Non-ducted, 2 tons	1	—	—	1%	4%
Non-ducted, 2.5–3 tons	1	—	—	2%	3%

Every CASI0 model in the market

CASI0’s 5 models with a known size and duct type, over the shape of the whole catalog.

CASI0 models by size and ratingColoured: CASI0 · grey shapes: all 14,508 models · lines: catalog medians by size

CASI0 models
Ducted median by size
Non-ducted median by size
Every model at each size (width = count)
Standard threshold

Dots: 5 casi0 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 CASI0 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 CASI0 model keeps at least 70% of its heat at 5°F with all three cold-climate ratings.

All-around best

No CASI0 model has all five all-around ratings.

Best model on each rating

CASI0’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	—	—	—	—	—
Capacity retention at 5°F	—	—	—	—	—
HSPF2	CA-18S18C-HP	8.0	Non-ducted, up to 1.5 tons	2%	217495517
SEER2	CA-18S18C-HP	17.0	Non-ducted, up to 1.5 tons	8%	217495517
EER2	CA-24S18C-HP	9.8	Non-ducted, 2 tons	13%	217495516
Heating capacity at 5°F	—	—	—	—	—

All 5 CASI0 models in Explore

CASI0 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.

CASI0: 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	None on this board (0 of 3 models qualify)	None on this board (0 of 3 models have all five ratings)
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)	None on this board (0 of 1 models have all five ratings)

All-around board, every manufacturer

Newest CASI0 certifications

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

The 5 most recently certified CASI0 outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
CA-30S18C-HPCASI0with ductless indoor unit CA-30S18E-HP	2.5 tons28,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	217495520
CA-12S18C-HP1CASI0with ductless indoor unit CA-12S18E-HP1	1 ton12,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	217495519
CA-12S18C-HP2CASI0with ductless indoor unit CA-12S18E-HP2	1 ton12,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	217495518
CA-18S18C-HPCASI0with ductless indoor unit CA-18S18E-HP	1.5 tons18,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	217495517
CA-24S18C-HPCASI0with ductless indoor unit CA-24S18E-HP	2 tons24,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	217495516

Shares hardware with

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

No shared hardware found for CASI0 in this group.

Compare CASI0

Manufacturers of a similar size, side by side.

Compare with any manufacturer

CASI0 includes these brand names as listed in AHRI: CASI0. Standards are checked against published thresholds; program rules beyond ratings are not checked.