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Today's Hours 8am - 11pm estThank you for your question. This condenser has a power supply of 208-230 V./60 Hz./1 Ph. IT requires a minimum circuit ampacity of 30 and a maximum fuse of 45. The 18K wall mount unit has the same power supply as the condenser. The air handler has a minimum circuit ampacity of 18 and a maximum fuse of 25. The indoor unit is powered by the outdoor condenser. To view a system that includes both the 36K outdoor condenser and the 18K wall mounted indoor air handlers, please click here.