Ideal-Air Pro Series Ductless Heating and Cooling Mini Splits are high efficiency performance at 18 SEER. They have inverter compressor technology offering 30% - 50% energy savings. The indoor evaporator unit can be easily installed with included wall mount. Includes LCD screen hand held programmable remote controller. Auto restart after power failure. Requires certified HVAC-professional installation. Refrigerant lines sold separately. Requires field supplied electrical and communication wiring. Mini Split interconnecting wires contain 25 ft of 14 GA/3 conductor wire x 25 ft 16 GA/2 conductor wire (shielded) in addition to the insulated copper refrigerant line. The tube diameters for both 700572 and 700576 are 1/4 in and 5/8 in.700476 Supply Voltage: 208/230V, 15 amp, 1 ph, 60 Hz MOC Protection 20 amp. 700478 Supply Voltage: 208/230V, 25 amp, 1 ph, 60 Hz MOC Protection 40 amp. 700476 Operating Amps: 13.22/11.95 AMP, 700478 Operating Amps: 20.67/18.69 AMP. Cooling Capacity: 700476 25,000 BTU/H, 700478 36,000 BTU/H and Heating Capacity: 700476 26,000 BTU/H, 700478 36,000 BTU/H. Efficiency: 18 SEER, 700476 HSPF: 10.00, 700478 HSPF: 9.00. 700476 Indoor dB Rating: 63, Outdoor dB Rating: 68 and 700478 Indoor dB Rating: 64, Outdoor dB Rating: 75. Refrigerant Precharge: 700476 is 56.40 oz. 700478 is 91.71 of R410A. Outdoor Ambient operating range: (Cooling = 0° to 109°F), (Heating = 5° to 75°F).