Atmor 10.5kw/240v Point-Of-Use Tankless Electric Instant Water Heater Including Pressure Relief Device, AT-900-10 Designed for single showers Recommended flow rate 1.65 GPM (Gallons per Minute). Water saver shower head highly recommended for optimal performance Requires a direct connection to a 50 Amp single-phase, double pole breaker. Required wire size: 6 AWG. 240 volts. Instant and endless hot water on demand without the wait or worry of ever running out Includes a Pressure Relief Device (PRD)