The rectangular duct complies with the UNEIX 100-101 and UNEIX 100-102 norms which specifies its construction.
It complies, in this way, to the 300º 90 minutes’ norm regarding the classification to fire for parking.
It complies with the 400º2hours norm. The union can be done via pod join or via Metu profiles.
Upon command, the rectangular duct can be internally lined with an insulating material against fire A2 classification. Reinforced side sheets of the ducts through the light ripple, replacing the “diamond’s point” method. The join is done by the Pittsburg system.