Rheem RETEX-04 is a 3.5-kilowatt electric tankless water heater ideal for point-of-use hand washing applications, and great in places like bathrooms, bars, strip malls, doctor's offices, boats, recreational vehicles (RV). This tankless water heater is recommended for use with a single sink only. Do not use with a shower or multiple fixtures. To select the best solution for your hot water needs, please refer to the electric tankless hot water heater sizing guide. With Rheem Tankless Electric you will be happier knowing the warm water you expect is available endlessly and on-demand, allowing you to reduce your water and energy waste. Now that feels warm all over!