Electric Tankless Water Heater Point-of-Use Water Heater Application Undersink Commercial Watts - Water Heaters 10 000 W Amps - Water Heaters 36 A Voltage - Water Heaters 277 Min Flow Activation 0.8 gpm Phase - Water Heaters 1 Temp Range - Water Heaters 82 Degrees to 130 Degrees F Water Connection 3/8 in Compression Temp Rise @ 0.5 GPM 137 Degrees F Temp Rise @ 1.5 GPM 46 Degrees F Temp Rise @ 6.0 GPM 11 Degrees F Temp Rise @ 2.5 GPM - Water Heaters 27 Degrees F