Electric Tankless Water Heater, Whole House, Water Heater Application General Purpose, Residential, Watts - Water Heaters 13,000 W, Amps - Water Heaters 54 A, Voltage - Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase - Water Heaters 1, Temp. Range - Water Heaters 80 Degrees to 140 Degrees F, Water Connection 1/2 in Compression, Temp. Rise @ 0.5 GPM Limited to maximum temperature, Temp. Rise @ 1.5 GPM 59 Degrees F, Temp. Rise @ 2.5 GPM - Water Heaters 36 Degrees F