Workshop for spiral-wound ducts manufacturing produces goods under its own “Spirovent” trademark. Air ducts are manufactured from strands of galvanized and stainless steel by spiral winding on a Swiss automated line. The equipment installed is of the newest generation and enables higher efficiency in comparison with previous analogues. Air ducts manufactured on this line are characterized by highest joint tightness and absolutely smooth inner surface. A wide range of galvanized shaped products are manufactured in this workshop, such as couplings, nipples, bends, tees, transitions, crosses and plugs, which allows assembling air duct systems of any complexity.