FLEXIBLE VENTILATION PIPE (PVC): A flexible element that can be placed between the start and end points of an ventilation system. It can be directly fitted to the connection with a circular cross-section, which is most often used for ventilation devices (e.g. fans, hoods, etc.). In general, it does not require a special conversion element. It enables a simple and quick installation. Curves / bends according to the specifics of the installation can be created with their application.