ThermoDuct is manufactured locally. It is the first ducting system of its kind. The outer and inner cladding of the ducting is manufactured from sisalation foil while the interior is a foam, with fire retardant properties which is blown into a three meter long mold. ThermoDuct is strong, environmentally friendly, aesthetically pleasing, has good thermal properties and competitively priced. While final tests are yet to be completed, the thermal properties are expected to allow air with temperatures ranging from well below freezing point to ± 80 ̊C. We currently have stock of 325 diameter ducting and are in the process of manufacturing diameters from 150mm to 500mm to meet the varying demands of the market.