Outdoor Unit	Indoor Unit	BTU Option
CU-2S18PKZ	CS-S9PKZW	9K BTU
CU-2S18PKZ	CS-S12PKZW	12K BTU

Please note that warranty coverage is only limited to the following combination:


            

Panasonic System 1	Panasonic System 2 (4 Ticks)	Panasonic System 3 (3 Ticks)

Panasonic System 4 (2 Ticks)	Panasonic System 3  (2 Ticks)