Electric Tankless Water Heater Operating Voltage 208/240V AC Phase Three Cold Inlet Size 3/4 in Maximum Flow Rate 20 gpm Minimum Flow Activation 0.5 gpm Overall Height 18.52 in Overall Width 20.47 in Overall Depth 5.84 in Power Consumption 24 000 W Maximum Delivered Temperature 70 Degrees F Minimum Delivered Temperature 180 Degrees F Adjustable Thermostat Yes Current 67 A Environment Indoor Market Commercial Industrial