Electric Tankless Water Heater, Point-of-Use, Water Heater Application General Purpose, Commercial/Residential, Watts - Water Heaters 20, 000 W, Amps - Water Heaters 24 A, Voltage - Water Heaters 480, Min. Flow Activation 0.35 gpm, Phase - Water Heaters 3, Water Connection 3/4 in NPT, Temp. Rise @ 6.0 GPM Limited to Thermostatic Setting, Temp. Rise @ 2.5 GPM - Water Heaters 55 Degrees F, Temp. Rise @ 4.0 GPM 34 Degrees F