Black + Decker 18kW Electric Tankless Water Heater

This water heater requires 2 x 40 Amp double-pole breakers and 240-Volt. It offers flow rates of 3.7 GPM at 35°F rise and 2 GPM at 65°F rise. The unit features stainless steel, lead-free internal canisters and standard 3/4 in. NPT fittings. Price drops from $369.99 to $318.99 with free shipping.