Achazel heat pump efficiency: 3 outdoor models compared

Achazel 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 Achazel makes. Achazel 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: 3
AHRI certifications: 3
Efficiency index: 20%; Typical model vs same-size, same-type peers (3 models)
Meet CEE 2025: 66.7%; 2 models

How Achazel 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.

Achazel against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Achazel’s own modelsAchazel is strongest on heating capacity at 5°F (its typical model beats 40% of comparable models) and weakest on EER2 (13%).

Achazel
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of Achazel’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index3 models scored	20%	Not ranked	—
COP at 5°F3 models scored	17%	Not ranked	1.80
Capacity retention at 5°F3 models scored	34%	Not ranked	70%
HSPF23 models scored	16%	Not ranked	8.5
SEER23 models scored	23%	Not ranked	19.0
EER23 models scored	13%	Not ranked	10.0
Heating capacity at 5°F3 models scored	40%	Not ranked	8,600 Btu/h

Standards met

Share of Achazel’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	66.7%	2
CEE 2026 Tier 1 (Split ASHP)	66.7%	2
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	66.7%	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.

Achazel’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

Achazel (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	20%	17%	16%	23%

Every Achazel model in the market

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

Achazel models by size and ratingColoured: Achazel · grey shapes: all 11,475 models · lines: catalog medians by size

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

Dots: 3 achazel 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 11, 2026

Top Achazel 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 2 Achazel 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
1ACA-2504AAchazelwith ductless indoor unit ACA-2503A	1 ton12,000 Btu/h · Non-ducted	70%	1.80	8.5	8,600	19.0	CEE 25CEE 26Xcel	1	214584771	Non-ducted, up to 1.5 tons	28.4
2ACA-2502AAchazelwith ductless indoor unit ACA-2501A	1 ton9,000 Btu/h · Non-ducted	70%	1.75	8.5	7,000	19.0	CEE 25CEE 26Xcel	1	214584770	Non-ducted, up to 1.5 tons	20.8

All-around best

Top 3 Achazel 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
1ACA-2504AAchazelwith ductless indoor unit ACA-2503A	1 ton12,000 Btu/h · Non-ducted	70%	1.80	8.5	19.0	10.0	CEE 25CEE 26Xcel	1	214584771	Non-ducted, up to 1.5 tons	23.6	28.4	18.9	28.4
2ACA-2502AAchazelwith ductless indoor unit ACA-2501A	1 ton9,000 Btu/h · Non-ducted	70%	1.75	8.5	19.0	10.0	CEE 25CEE 26Xcel	1	214584770	Non-ducted, up to 1.5 tons	19.9	20.8	18.9	20.8
3ACA-2508AAchazelwith ductless indoor unit ACA-2507A	1.5 tons18,000 Btu/h · Non-ducted	59%	1.80	8.5	19.0	9.4	None	1	214584772	Non-ducted, up to 1.5 tons	16.6	17.4	15.7	Not a pick

Best model on each rating

Achazel’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	ACA-2504A	1.80	Non-ducted, up to 1.5 tons	22%	214584771
Capacity retention at 5°F	ACA-2504A	70%	Non-ducted, up to 1.5 tons	46%	214584771
HSPF2	ACA-2502A	8.5	Non-ducted, up to 1.5 tons	16%	214584770
SEER2	ACA-2502A	19.0	Non-ducted, up to 1.5 tons	23%	214584770
EER2	ACA-2502A	10.0	Non-ducted, up to 1.5 tons	15%	214584770
Heating capacity at 5°F	ACA-2508A	11,600 Btu/h	Non-ducted, up to 1.5 tons	61%	214584772

All 3 Achazel models in Explore

Achazel 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.

Achazel: 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	28.4(50 is the typical model of its size class)ACA-2504Awith ductless indoor unit ACA-2503A2 of 3 models qualify · AHRI 214584771	23.6(50 is the typical model of its size class)ACA-2504Awith ductless indoor unit ACA-2503A3 of 3 models have all five ratings · AHRI 214584771

All-around board, every manufacturer

Newest Achazel certifications

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

The 3 most recently certified Achazel outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
ACA-2508AAchazelwith ductless indoor unit ACA-2507A	1.5 tons18,000 Btu/h · Non-ducted	1.80	59%	8.5	19.0	None	1	214584772
ACA-2504AAchazelwith ductless indoor unit ACA-2503A	1 ton12,000 Btu/h · Non-ducted	1.80	70%	8.5	19.0	CEE 25CEE 26Xcel	1	214584771
ACA-2502AAchazelwith ductless indoor unit ACA-2501A	1 ton9,000 Btu/h · Non-ducted	1.75	70%	8.5	19.0	CEE 25CEE 26Xcel	1	214584770

Shares hardware with

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

No shared hardware found for Achazel in this group.

Compare Achazel

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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