Electric Tankless Water Heater Point-of-Use Water Heater Application General Purpose Commercial Watts - Water Heaters 18 000 Amps - Water Heaters 50 Voltage - Water Heaters 208 Min Flow Activation 0.70 gpm Phase - Water Heaters 3 Temp Range - Water Heaters 100 Degrees to 140 Degrees F Water Connection 1/2 in Compression Temp Rise @ 1.5 GPM 55 Degrees F Temp Rise @ 2.5 GPM - Water Heaters 49.2 Degrees F Temp Rise @ 4.0 GPM 30.7 Degrees F