A good supporting system is important for a professional installed ventilation system. Recantgular duct work is mostly installed with mounting rails, sliding nuts, corner profiles and threaded rods. Circular ducts are supported with insulated suspension rings or brackets with threaded rods or perforated suspension straps. Airco units are supported by wall brackets when mounted on the wall or a modular ground support structure of independent feet and Sendzimir galvanized steel struts