Atmor AT-900-08 Tankless Water Heater Electric, 8.5kW, White Designed for a single/ double sink nationwide OR a single shower in areas with ground water temperature 67F or higher Recommended flow rate 1.23 GPM (Gallons per Minute) Requires a direct connection to a 40 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)