Electric Tankless Water Heater Point-of-Use Water Heater Application Undersink Commercial/Residential Watts - Water Heaters 19 000 Amps - Water Heaters 80 Voltage - Water Heaters 240 Min Flow Activation 0.30 gpm Phase - Water Heaters 1 Temp Range - Water Heaters 105 Degrees to 110 Degrees F Water Connection 3/4 in MNPT Temp Rise @ 1.5 GPM 86.5 Degrees F Temp Rise @ 2.5 GPM - Water Heaters 52 Degrees F Temp Rise @ 4.0 GPM 32.4 Degrees F