Ecosmart® POU3.5 Electric Water Heater 1-Phase 3.5kW 120V. EcoSmart POU 3.5 is a 3.5-kilowatt tankless electric water heater ideal for point-of-use hand washing applications and great in places like bathrooms, bars, strip malls, doctor’s offices, boats, and recreational vehicles(RV). It has a maximum flow rate of 0.5 gallons per minute (gpm) and includes a 0.5 gpm sink aerator. This product is recommended for use with a single sink only. Do not use it with a shower or multiple fixtures. To select the best solution for your hot water needs, please refer to the sizing guide. With EcoSmartyou will be happier knowing the warm water you expect is available endlessly, consistently, and on-demand, allowing you to reduce your water and energy waste. Now that feels warm all over! EcoSmart – Sharing the Warmth.