Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.

AIRDACH and Panasonic on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, AIRDACH and Panasonic split the 6 ratings 3–3.

AIRDACH
Panasonic
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	AIRDACH	Panasonic
Efficiency index	57% (higher)median —	47% (higher)median —
COP at 5°F	47% (higher)median 1.91	40% (higher)median 1.90
Capacity retention at 5°F	39%median 67%	50%median 68%
HSPF2	49%median 8.1	57%median 9.2
SEER2	54% (higher)median 16.0	48% (higher)median 17.8
EER2	58% (higher)median 11.7	39% (higher)median 10.7
Heating capacity at 5°F	41%median 14,000 Btu/h	53%median 15,150 Btu/h
Outdoor models	23	36
AHRI certifications	34	56

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	AIRDACH	Panasonic
CEE 2025 Tier 1 (Split ASHP)	39.1%9 models	52.8%19 models
CEE 2026 Tier 1 (Split ASHP)	39.1%9 models	47.2%17 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	21.7%5 models	36.1%13 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	0%0 models	36.1%13 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.

Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 7 groups where both have models

AIRDACH
Panasonic
All models of the group

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of Oct 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	AIRDACH	Panasonic
Ducted, up to 1.5 tons	2 · index 57%	7 · index 51%
Ducted, 2 tons	2 · index —	3 · index 53%
Ducted, 2.5–3 tons	5 · index 66%	5 · index 46%
Ducted, 3.5–4.5 tons	6 · index 64%	3 · index 53%
Ducted, 5 tons and up	None	1 · index 42%
Non-ducted, up to 1.5 tons	6 · index 58%	16 · index 47%
Non-ducted, 2 tons	1 · index 56%	4 · index 40%
Non-ducted, 2.5–3 tons	4 · index 50%	1 · index 37%
Non-ducted, 3.5–4.5 tons	1 · index 52%	None

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). 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.
Size and duct type	AIRDACHCold-climate score, best model	PanasonicCold-climate score, best model
Ducted, up to 1.5 tons	46.5(50 is the typical model of its size class)AMSH1800VM1-D1 of 2 models qualify · AHRI 210474672	64.3(50 is the typical model of its size class) (higher)CU-HE18YAHK6with ducted air handler CS-HE18YAC64 of 7 models qualify · AHRI 212396504
Ducted, 2 tons	None on this board (0 of 2 models qualify)	67.3(50 is the typical model of its size class)CU-E24YAHK6with ducted air handler CS-HE24YAC63 of 3 models qualify · AHRI 212396499
Ducted, 2.5–3 tons	None on this board (0 of 5 models qualify)	78.6(50 is the typical model of its size class)CU-HE36YAHK6with ducted air handler CS-HE36YAC62 of 5 models qualify · AHRI 212396507
Ducted, 3.5–4.5 tons	None on this board (0 of 6 models qualify)	73.8(50 is the typical model of its size class)CU-HE48YAHK6with ducted air handler CS-HE48YAHK62 of 3 models qualify · AHRI 212396496
Ducted, 5 tons and up	No models in this size class	None on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons	70.6(50 is the typical model of its size class)ACSH1823VM2-Dwith ductless indoor unit AIWH1800VM2-D3 of 6 models qualify · AHRI 209948207	87.4(50 is the typical model of its size class) (higher)CU-XE9WKUAwith ductless indoor unit CS-XE9WKUAW6 of 16 models qualify · AHRI 205047851
Non-ducted, 2 tons	None on this board (0 of 1 models qualify)	64.2(50 is the typical model of its size class)CU-XE24WKUAwith ductless indoor unit CS-XE24WKUAW2 of 4 models qualify · AHRI 205047855
Non-ducted, 2.5–3 tons	50.1(50 is the typical model of its size class)AMSH2700VM1-D1 of 4 models qualify · AHRI 210474674	None on this board (0 of 1 models qualify)
Non-ducted, 3.5–4.5 tons	39.4(50 is the typical model of its size class)AMSH4800VM1-D1 of 1 models qualify · AHRI 210474680	No models in this size class

All-around best

Best all-around model per size and duct type. 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.
Size and duct type	AIRDACHAll-around score, best model	PanasonicAll-around score, best model
Ducted, up to 1.5 tons	56.7(50 is the typical model of its size class)AMSH1800VM1-D1 of 2 models have all five ratings · AHRI 210474672	75.4(50 is the typical model of its size class) (higher)CU-E9SD3UAwith ducted air handler CS-E9SD3UAW7 of 7 models have all five ratings · AHRI 9125308
Ducted, 2 tons	None on this board (0 of 2 models have all five ratings)	65.8(50 is the typical model of its size class)CU-HE24YAHK6with ducted air handler CS-HE24YAHK63 of 3 models have all five ratings · AHRI 212396493
Ducted, 2.5–3 tons	75.5(50 is the typical model of its size class) (higher)AMSH2700VM1-D2 of 5 models have all five ratings · AHRI 210474675	56.1(50 is the typical model of its size class)CU-HE36YAHK6with ducted air handler CS-HE36YAHK65 of 5 models have all five ratings · AHRI 212396495
Ducted, 3.5–4.5 tons	63.5(50 is the typical model of its size class) (higher)AMSH4800VM1-D1 of 6 models have all five ratings · AHRI 210474681	53.3(50 is the typical model of its size class)CU-HE55YAHK6with ducted air handler CS-HE60YAHK63 of 3 models have all five ratings · AHRI 212396497
Ducted, 5 tons and up	No models in this size class	41.7(50 is the typical model of its size class)CU-E60YAHK6with ducted air handler CS-HE60YAHK61 of 1 models have all five ratings · AHRI 212396491
Non-ducted, up to 1.5 tons	75.9(50 is the typical model of its size class)ACSH1823VM2-Dwith ductless indoor unit AIWH1800VM2-D6 of 6 models have all five ratings · AHRI 209948207	92.0(50 is the typical model of its size class) (higher)CU-XE9WKUAwith ductless indoor unit CS-XE9WKUAW14 of 16 models have all five ratings · AHRI 205047851
Non-ducted, 2 tons	56.2(50 is the typical model of its size class)ACSH2421VM2-Dwith ductless indoor unit AIWH2400VM2-D1 of 1 models have all five ratings · AHRI 209948204	73.7(50 is the typical model of its size class) (higher)CU-4E24RBU-54 of 4 models have all five ratings · AHRI 10221204
Non-ducted, 2.5–3 tons	67.1(50 is the typical model of its size class) (higher)AMSH2700VM1-D3 of 4 models have all five ratings · AHRI 210474674	36.8(50 is the typical model of its size class)CU-5E36QBU-51 of 1 models have all five ratings · AHRI 10221207
Non-ducted, 3.5–4.5 tons	51.7(50 is the typical model of its size class)AMSH4800VM1-D1 of 1 models have all five ratings · AHRI 210474680	No models in this size class

All-around board, every manufacturer

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.

Top model per rating by peer percentile, with its AHRI-certified value and peer group
Rating	AIRDACH	Panasonic
COP at 5°F	beats 96% · 2.38ACSH1823VM2-DNon-ducted, up to 1.5 tons	beats 90% · 2.24CU-E18RKUANon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 67% · 80%ACSH0924VM2-DNon-ducted, up to 1.5 tons	beats 94% · 111%CU-XE9WKUANon-ducted, up to 1.5 tons
HSPF2	beats 95% · 9.7AMSH4800VM1-DDucted, 3.5–4.5 tons	beats 95% · 12.0CU-XE9WKUANon-ducted, up to 1.5 tons
SEER2	beats 98% · 21.0AMSH2700VM1-DDucted, 2.5–3 tons	beats 97% · 20.5CU-E9SD3UADucted, up to 1.5 tons
EER2	beats 85% · 14.0ACSH0924VM2-DNon-ducted, up to 1.5 tons	beats 97% · 16.1CU-XE9WKUANon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 85% · 14,000 Btu/hAMSH1800VM1-DNon-ducted, up to 1.5 tons	beats 95% · 48,500 Btu/hCU-HE55YAHK6Ducted, 3.5–4.5 tons

More comparisons

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AIRDACH vs Panasonic heat pumps