Electric Tankless Water Heater Point-of-Use Water Heater Application Sanitation Commercial Watts - Water Heaters 20 000 Amps - Water Heaters 72 Voltage - Water Heaters 277 Min Flow Activation 0.70 gpm Phase - Water Heaters 1 Temp Range - Water Heaters 180 Degrees F Water Connection 1/2 in Compression Temp Rise @ 1.5 GPM 91 Degrees F Temp Rise @ 2.5 GPM - Water Heaters 54 Degrees F Temp Rise @ 4.0 GPM 46 Degrees F