Panasonic heat pumps

54 ENERGY STAR certified Panasonic outdoor units (33 mini-split, 21 central). The most efficient is the CS-Z9AKUAW/CU-XZ9AKUAC at 27.5 SEER2 and 12.0 HSPF2; 45 models are rated for cold climates.

Some of these units are also certified under Napoleon, ZERO, AI AIR CONDITIONING, ComfortStar, TRUST AIR CONDITIONERS, Mitsutomo, SLIMAIR, CanAir.

ENERGY STAR data, updated October 12, 2026

54 models, ranked by SEER2 (cooling efficiency), then HSPF2.

#		Type						Cold
1	Panasonic CS-Z9AKUAW/CU-XZ9AKUACDeluxe Z	Mini-split	9,000 BTU	27.5	16.4	12.0	11,700	Yes	1
2	Panasonic CU-XZ9AKUACClimapure XZ	Mini-split	9,000 BTU	27.5	16.4	12.0	11,700	Yes	2
3	Panasonic CU-XE9WKUACS-XE9WKUAW / CU-XE9WKUA	Mini-split	9,000 BTU	27.3	16.1	12.0	9,700	Yes	1
4	Panasonic CS-Z12AKUAW/CU-XZ12AKUACDeluxe Z	Mini-split	12,000 BTU	25.0	14.4	11.7	13,700	Yes	1
5	Panasonic CU-XZ12AKUACClimapure XZ	Mini-split	12,000 BTU	25.0	14.4	11.7	13,700	Yes	2
6	Panasonic CU-YM9CBUCCU Series	Mini-split	9,000 BTU	24.6	14.7	13.0	8,600	Yes	3
7	Panasonic CU-YM12CBUCCU Series	Mini-split	12,000 BTU	24.6	12.7	11.5	8,900	Yes	4
8	Panasonic CU-XE12WKUACS-XE12WKUAW / CU-XE12WKUA	Mini-split	12,000 BTU	24.6	14.2	11.0	10,200	Yes	1
9	Panasonic CU-3Z22ABUCMulti Zone	Mini-split	24,000 BTU	24.5	12.8	10.7	23,000	Yes	2
10	Panasonic CU-4Z24BBUCMulti Zone	Mini-split	24,000 BTU	24.0	13.5	11.4	27,000	Yes	2
11	Panasonic CU-YM18CBUCCU Series	Mini-split	18,000 BTU	24.0	13.5	11.4	14,200	Yes	3
12	Panasonic CU-YM24CBUCCU Series	Mini-split	24,000 BTU	23.5	13.0	11.0	19,000	Yes	3
13	Panasonic CU - 5YM36CBUCCU Series	Mini-split	36,000 BTU	23.1	12.0	10.0	26,000	Yes	3
14	Panasonic CU-E9RKUACS-E9RKUAW / CU-E9RKUA	Mini-split	9,000 BTU	23.0	13.0	10.3	-	No	1
15	Panasonic CU - 3YM18CBUCCU Series	Mini-split	18,000 BTU	23.0	12.5	10.0	14,600	Yes	3
16	Panasonic CU - 4YM27CBUCCU Series	Mini-split	24,000 BTU	23.0	12.2	9.5	19,000	Yes	3
17	Panasonic CU-2Z18ABUCMulti Zone	Mini-split	18,000 BTU	22.5	15.0	12.5	22,000	Yes	2
18	Panasonic CU-E12RKUACS-E12RKUAW / CU-E12RKUA	Mini-split	12,000 BTU	22.5	12.5	9.0	-	No	1
19	Panasonic CS-XZ15AKUAW/CU-XZ15AKUACClimaPure XZ	Mini-split	15,000 BTU	22.4	13.4	12.0	15,300	Yes	1
20	Panasonic CU-XZ15AKUACClimapure XZ	Mini-split	15,000 BTU	22.4	13.4	12.0	15,300	Yes	2
21	Panasonic CS-Z18AKUAW/CU-XZ18AKUACDeluxe Z	Mini-split	18,000 BTU	22.0	13.7	11.7	17,800	Yes	1
22	Panasonic CU-XZ18AKUACClimapure XZ	Mini-split	18,000 BTU	22.0	13.7	11.7	17,800	Yes	2
23	Panasonic CU-XE15WKUACS-XE15WKUAW / CU-XE15WKUA	Mini-split	15,000 BTU	22.0	12.6	11.0	15,300	Yes	1
24	Panasonic CU-XE18WKUACS-XE18WKUAW / CU-XE18WKUA	Mini-split	18,000 BTU	22.0	13.2	10.9	17,500	Yes	1
25	Panasonic CU-5Z36BBUCMulti Zone	Mini-split	36,000 BTU	22.0	11.8	10.3	27,000	Yes	2
26	Panasonic CU-3E19RBU-5CU-3E19RBU-5	Mini-split	18,000 BTU	22.0	12.6	10.1	18,900	Yes	1
27	Panasonic CU-4E24RBU-5CU-4E24RBU-5	Mini-split	24,000 BTU	22.0	12.6	9.1	-	No	1
28	Panasonic CU - 6YM48CBUCCU Series	Mini-split	42,000 BTU	21.3	11.7	10.6	38,000	Yes	3
29	Panasonic CS-Z24AKUAW/CU-XZ24AKUACDeluxe Z	Mini-split	24,000 BTU	20.5	11.8	11.0	20,400	Yes	1
30	Panasonic CU-XZ24AKUACClimapure XZ	Mini-split	24,000 BTU	20.5	11.8	11.0	20,400	Yes	2
31	Panasonic CU-E9SD3UACS-E9SD3UAW / CU-E9SD3UA	Central	under 1.5-ton	20.5	13.0	9.9	-	No	1
32	Panasonic CU-E12SD3UACS-E12SD3UAW / CU-E12SD3UA	Central	under 1.5-ton	20.0	12.5	9.5	-	No	1
33	Panasonic CU-E18RKUACS-E18RKUAW / CU-E18RKUA	Mini-split	18,000 BTU	19.5	13.2	9.0	-	No	1
34	Panasonic CU-HM18BAHUCU Series	Central	1.5-ton	19.0	12.5	9.7	18,000	Yes	15
35	Panasonic CU-2E18SBU-5CU-2E18SBU-5	Mini-split	18,000 BTU	19.0	12.6	9.1	17,700	Yes	2
36	Panasonic CU-M18BAHUCU Series	Central	1.5-ton	18.8	11.0	9.1	11,200	No	1
37	Panasonic CU-HM24BAHUCU Series	Central	2-ton	18.3	11.7	10.0	21,600	Yes	9
38	Panasonic CU-M24BAHUCU Series	Central	2-ton	18.1	11.0	9.7	21,600	Yes	9
39	Panasonic CU-HE18YAHK6CU series	Central	1.5-ton	18.0	12.4	9.5	16,500	Yes	3
40	Panasonic CU-HM36BAHUCU Series	Central	3-ton	17.4	11.7	10.3	39,000	Yes	8
41	Panasonic CU-HE24YAHK6CU series	Central	2-ton	17.4	11.7	10.0	22,600	Yes	2
42	Panasonic CU-HM55BAHUCU Series	Central	4-ton	17.1	10.3	9.0	52,000	Yes	8
43	Panasonic CU-M30BAHUCU Series	Central	2.5-ton	17.1	11.0	8.3	18,000	No	2
44	Panasonic CU-E24YAHK6CU series	Central	2-ton	17.0	10.5	9.8	19,400	Yes	2
45	Panasonic CU-HM30BAHUCU Series	Central	2.5-ton	16.8	11.7	10.0	32,600	Yes	13
46	Panasonic CU-M48BAHUCU Series	Central	3.5-ton	16.7	10.3	9.0	40,000	Yes	9
47	Panasonic CU-HM48BAHUCU Series	Central	4-ton	16.6	10.0	9.5	46,000	Yes	9
48	Panasonic CU-HE30YAHK6CU series	Central	2.5-ton	16.2	10.0	9.7	27,000	Yes	2
49	Panasonic CU-M60BAHUCU Series	Central	4-ton	16.2	8.9	8.6	39,000	Yes	8
50	Panasonic CU-M36BAHUCU Series	Central	3-ton	16.1	10.0	8.7	27,000	Yes	4
51	Panasonic CU-HE36YAHK6CU series	Central	3-ton	16.0	10.0	10.0	34,400	Yes	4
52	Panasonic CU-RE18SKUACS-RE18SKUA / CU-RE18SKUA	Mini-split	18,000 BTU	16.0	12.3	8.5	-	No	1
53	Panasonic CU-HE48YAHK6CU series	Central	4-ton	15.6	8.2	9.4	46,000	Yes	1
54	Panasonic CU-HE55YAHK6CU series	Central	5-ton	15.3	8.8	9.4	48,500	Yes	1