Thermorail 12 Volt Heated Towel Rails are a modular system consisting of single rails allowing you to choose the spacing and angle of fitting. Usually rails are installed in multiples of 3 or 4 but as many as required can be installed as a set. Transformers are supplied as a part of the package according to the number of rails used. 12V rails have completely concealed wiring – some pre-wiring in the wall cavity will be required. Rails are designed to operate at the same temperature as standard rails with the advantage of an added level of safety for use in wet areas. Right hand wiring is standard but can be swapped to left hand wiring if required (fees apply).