Geodesy SPP The SPP can be used on all PSC air conditioning units ranging from 5,00010 120,000 BTU's (ato 10H.P.12010 288 volts. PLEASE NOTE: When using start capacitors for air conditioners up to and including 16,000 BTU's (1-2 H.R}, you can use start capacitors rated at 250 VAC. For larger units, use start capacitors rated for 330 VAC. The SPP can be used with any standard MFD rated start capacitor. You can use manufacturers recommended MFD capacitor rating for the particular unit if necessary.