11 Kilowatt, Smart Technology Electric Tankless Water Heater, Configured For Climates Where Incoming Water Temperature Is 67 Degrees & Above, For Heating Up To 2 Gallons Per Minute, Which Is The Equivalent Of 1 Shower Head With A 1.5 GPM Flow & 1 Sink With A Low Inlet Water Temperature Of 67 Degrees, Digital Temperature Control Allows You To Set Your Temperature In Increments Of 1, Features 2 Heating Elements, Uses 1/2" NPT Pipe Fittings, 240V, Requires One 60A Double Pole Breaker & Two 6 Gauge Wires. 11 Kilowatt, Uses 1/2" NPT Pipe Fittings. 240 Volt, Requires 1 - 60 amp Double Pole Breaker and 2 - 6 gauge wires