Powerstar, Whole House Electric Tankless Water Heater, For 1 Major Appliance, Tub, Shower Or Washing Machine, At A Time, Delivers 3.7 Gallons Per Minute At A 50 Degree Fahrenheit Temperature Rise, Maximum Output Temperature Of 131 Degree Fahrenheit, 95% Efficiency Rating, Solid Copper Heat Exchanger, External Control Knob, Electronic Flow Switch, Activates Unit Only When Water Flows Through It, Flow Sensor To Provide A Constant Output Temperature, Minimum Electrical Service Required 200AMP, AE125 Requires 120AMP, Three 40AMP Double Pole Breakers, CSA Approved.