With a standard heating element the wattage of the element is matched according to the size of the radiator. It will then heat the liquid inside the radiator and the heat is dispersed by the surface area of the radiator. It has the protection of a thermal cut out should the element become too hot, however there is no control over the radiator or the room temperature. The element is IP55 rated and is suitable for IEE zone 1,2 and 3. It is perfect for use with a digital wall controller.