Electric Tankless Water Heater Point-of-Use Water Heater Application General Purpose Commercial Watts - Water Heaters 16 000 Amps - Water Heaters 58 Voltage - Water Heaters 277 Min Flow Activation 0.75 gpm Phase - Water Heaters 1 Temp Range - Water Heaters 100 Degrees to 140 Degrees F Water Connection 3/4 in MNPT Temp Rise @ 1.5 GPM 72.8 Degrees F Temp Rise @ 2.5 GPM - Water Heaters 43.7 Degrees F Temp Rise @ 4.0 GPM 27.3 Degrees F