Ducts, duct fittings, connectors and tees are indispensable for creating an indoor air extraction and fresh air distribution system. Wherever circular cross-section ducts are used, the internal ductwork must be circular.
Our circular internal systems consist of spiro ducts and circular cross-section fittings. Circular ventilation ducts with flanges. All circular ducts and fittings are made of galvanized steel according to Polish standards.