Panasonic heat pump efficiency: 36 outdoor models compared

Panasonic has 36 heat pump outdoor models certified with this refrigerant group, in 56 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 Panasonic makes. Panasonic 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: 36
AHRI certifications: 56
Efficiency index: 47%; Typical model vs same-size, same-type peers (38 models)
Meet CEE 2025: 52.8%; 19 models

How Panasonic 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.

Panasonic against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Panasonic’s own modelsPanasonic is strongest on HSPF2 (its typical model beats 57% of comparable models) and weakest on EER2 (39%).

Panasonic
Middle half of its models
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile of Panasonic’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index38 models scored	47%	Not ranked	—
COP at 5°F38 models scored	40%	Not ranked	1.90
Capacity retention at 5°F38 models scored	50%	Not ranked	68%
HSPF240 models scored	57%	Not ranked	9.2
SEER240 models scored	48%	Not ranked	17.8
EER240 models scored	39%	Not ranked	10.7
Heating capacity at 5°F38 models scored	53%	Not ranked	15,150 Btu/h

Standards met

Share of Panasonic’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	52.8%	19
CEE 2026 Tier 1 (Split ASHP)	47.2%	17
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	36.1%	13
DOE Cold Climate Heat Pump Challenge	0%	0
ENERGY STAR Cold Climate	36.1%	13

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.

Panasonic’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

Panasonic (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	7	51%	38%	47%	63%
Ducted, 2 tons	3	53%	54%	75%	61%
Ducted, 2.5–3 tons	5	46%	50%	74%	48%
Ducted, 3.5–4.5 tons	3	53%	48%	88%	60%
Ducted, 5 tons and up	1	42%	41%	85%	35%
Non-ducted, up to 1.5 tons	16	47%	35%	45%	40%
Non-ducted, 2 tons	4	40%	27%	53%	44%
Non-ducted, 2.5–3 tons	1	37%	64%	51%	30%

Every Panasonic model in the market

Panasonic’s 40 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 40 panasonic 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 Panasonic 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 5 Panasonic 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
1CU-XE9WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE9WKUAW	0.5 tons8,700 Btu/h · Non-ducted	111%	2.06	12.0	9,700	27.3	CEE 25CEE 26XcelES CC	1	205047851	Non-ducted, up to 1.5 tons	87.4
2CU-XE18WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE18WKUAW	1.5 tons17,200 Btu/h · Non-ducted	102%	2.05	10.9	17,500	22.0	CEE 25CEE 26XcelES CC	1	205047854	Non-ducted, up to 1.5 tons	82.7
3CU-XE12WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE12WKUAW	1 ton11,500 Btu/h · Non-ducted	89%	2.14	11.0	10,200	24.6	CEE 25CEE 26XcelES CC	1	205047852	Non-ducted, up to 1.5 tons	82.1
4CU-HE36YAHK6Panasonic · CU serieswith ducted air handler CS-HE36YAC6	3 tons35,000 Btu/h · Ducted	82%	2.00	10.0	32,000	15.2	CEE 25CEE 26XcelES CC	4	212396507	Ducted, 2.5–3 tons	78.6
5CU-XE15WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE15WKUAW	1 ton14,700 Btu/h · Non-ducted	104%	1.87	11.0	15,300	22.0	CEE 25CEE 26XcelES CC	1	205047853	Non-ducted, up to 1.5 tons	74.5

All-around best

Top 5 Panasonic 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
1CU-XE9WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE9WKUAW	0.5 tons8,700 Btu/h · Non-ducted	111%	2.06	12.0	27.3	16.1	CEE 25CEE 26XcelES CC	1	205047851	Non-ducted, up to 1.5 tons	92.0	87.4	96.6	87.4
2CU-XE12WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE12WKUAW	1 ton11,500 Btu/h · Non-ducted	89%	2.14	11.0	24.6	14.2	CEE 25CEE 26XcelES CC	1	205047852	Non-ducted, up to 1.5 tons	85.1	82.1	88.1	82.1
3CU-XE18WKUAPANASONIC · ClimaPure XEwith ductless indoor unit CS-XE18WKUAW	1.5 tons17,200 Btu/h · Non-ducted	102%	2.05	10.9	22.0	13.2	CEE 25CEE 26XcelES CC	1	205047854	Non-ducted, up to 1.5 tons	76.3	82.7	69.9	82.7
4CU-E9SD3UAPANASONIC · Exterios Ewith ducted air handler CS-E9SD3UAW	1 ton9,000 Btu/h · Ducted	65%	2.06	9.9	20.5	13.0	CEE 25CEE 26	1	9125308	Ducted, up to 1.5 tons	75.4	55.4	95.4	Not a pick
5CU-4E24RBU-5PANASONIC · Multizone	2 tons24,000 Btu/h · Non-ducted	88%	1.95	9.1	22.0	12.6	CEE 25CEE 26Xcel	2	10221204	Non-ducted, 2 tons	73.7	62.5	84.9	62.5

Best model on each rating

Panasonic’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	CU-E18RKUA	2.24	Non-ducted, up to 1.5 tons	90%	7958200
Capacity retention at 5°F	CU-XE9WKUA	111%	Non-ducted, up to 1.5 tons	94%	205047851
HSPF2	CU-XE9WKUA	12.0	Non-ducted, up to 1.5 tons	95%	205047851
SEER2	CU-E9SD3UA	20.5	Ducted, up to 1.5 tons	97%	9125308
EER2	CU-XE9WKUA	16.1	Non-ducted, up to 1.5 tons	97%	205047851
Heating capacity at 5°F	CU-HE55YAHK6	48,500 Btu/h	Ducted, 3.5–4.5 tons	95%	212396497

All 36 Panasonic models in Explore

Panasonic 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.

Panasonic: 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	64.3(50 is the typical model of its size class)CU-HE18YAHK6with ducted air handler CS-HE18YAC64 of 7 models qualify · AHRI 212396504	75.4(50 is the typical model of its size class)CU-E9SD3UAwith ducted air handler CS-E9SD3UAW7 of 7 models have all five ratings · AHRI 9125308
Ducted, 2 tons	67.3(50 is the typical model of its size class)CU-E24YAHK6with ducted air handler CS-HE24YAC63 of 3 models qualify · AHRI 212396499	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	78.6(50 is the typical model of its size class)CU-HE36YAHK6with ducted air handler CS-HE36YAC62 of 5 models qualify · AHRI 212396507	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	73.8(50 is the typical model of its size class)CU-HE48YAHK6with ducted air handler CS-HE48YAHK62 of 3 models qualify · AHRI 212396496	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	None on this board (0 of 1 models qualify)	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	87.4(50 is the typical model of its size class)CU-XE9WKUAwith ductless indoor unit CS-XE9WKUAW6 of 16 models qualify · AHRI 205047851	92.0(50 is the typical model of its size class)CU-XE9WKUAwith ductless indoor unit CS-XE9WKUAW14 of 16 models have all five ratings · AHRI 205047851
Non-ducted, 2 tons	64.2(50 is the typical model of its size class)CU-XE24WKUAwith ductless indoor unit CS-XE24WKUAW2 of 4 models qualify · AHRI 205047855	73.7(50 is the typical model of its size class)CU-4E24RBU-54 of 4 models have all five ratings · AHRI 10221204
Non-ducted, 2.5–3 tons	None on this board (0 of 1 models qualify)	36.8(50 is the typical model of its size class)CU-5E36QBU-51 of 1 models have all five ratings · AHRI 10221207

All-around board, every manufacturer

Newest Panasonic certifications

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

The 5 most recently certified Panasonic outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
CU-E18YAHK6Panasonicwith ducted air handler CS-HE24YAC6	1.5 tons18,000 Btu/h · Ducted	1.94	56%	8.6	15.2	CEE 25	2	213386556
CU-HE36YAHK6Panasonic · CU serieswith ducted air handler CS-HE36YAS6	3 tons35,000 Btu/h · Ducted	1.85	83%	8.6	15.5	CEE 25CEE 26XcelES CC	4	213160451
CU-HE18YAHK6Panasonic · CU serieswith ducted air handler CS-HE24YAC6	1.5 tons18,000 Btu/h · Ducted	2.20	79%	9.5	16.1	CEE 25CEE 26XcelES CC	4	213160450
CU-HE55YAHK6Panasonic · CU serieswith ducted air handler CS-HE60YAC6	4.5 tons53,000 Btu/h · Ducted	1.80	85%	8.6	14.5	ES CC	2	213160445
CU-HE48YAHK6Panasonic · CU serieswith ducted air handler CS-HE48YAC6	4 tons46,000 Btu/h · Ducted	1.80	78%	9.0	14.3	ES CC	2	212396508

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