The Ideal-Air™ Pro-Dual™ Indoor Head unit can be matched up with multiple different configurations with 1 single outdoor condensing unit. (See Match up chart online at www.ideal-air.com; this will also be listed on the packaging of the box). 208–230 V, 60 Hz, 1 ph, 3 speed fan, 43 dB sound rating, 17.5 Amps and 42 W. Line set connection 3/8 in x 5/8 in.