Camco's 3500W/120V Screw-In Type High Watt Density Tankless Water Heater Element is a universal replacement for EcoSmart electric tankless water heaters. This element is compatible with Eco POU 3.5 model. They are easy to install and come with detailed instructions on how to replace your old element. The replacement element must be the same voltage and wattage as the element being replaced. Never exceed the nameplate rating on the water heater.