Outdoor Unit	Indoor Unit	BTU Option
YPH3YC021BAMSA-X	YPHMXC009BAMS-FX	9K BTU
YPH3YC021BAMSA-X	YPHMXC012BAMS-FX	12K BTU
YPH3YC021BAMSA-X	YPHMXC018BAMS-FX	18K BTU

            

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

            

York System 1 (Non Inverter)	York System 3	York System 4