Terma aims to think differently when conceiving its towel rail designs and the Quadrus Slim has been designed with a single layer of ultra flat bars, with closely spaced gap differ from the standard ladder rail creating a fuller looking overall design. The bars protrude forward from the front of the upright bars for a projected look. This model comes with the completely internalised ONE heating element where all electrical components have been pushed up inside the towel rail meaning there is little in the way of an element on show at the bottom compared with a standard heating element. The electric towel rail is pre filled with oil and supplied with a factory-installed heating element (with the selected type of cable), meaning it can be installed and connected with minimal comissioning.