According to the public relations report of the Gilan Construction Engineering System Organization, a training seminar on engineering principles in the design of damper channels and air valves was organized by the organization’s specialized mechanical commission, on Wednesday, 11-10-1997 at 17:00 in the conference hall of the organization with the presence of engineer Farshid Rajabi, vice president. second organization; Engineer Hodi Pourghfar, a member of the organization’s board of directors, and a group of organization members were held. First, engineer Rahim Bakhoda, the head of the specialized mechanical commission, while welcoming and thanking the guests for their presence, mentioned that one of the goals of the specialized mechanical commission is to hold specialized seminars in order to improve the technical knowledge of engineers. In the continuation of the seminar, engineer Ramin Karmi and engineer Mustafa Yousefi, one of the technical staff members of Shahrokhi Institute, gave a speech and the purpose of this seminar was to pay attention of engineers to the implementation points in the projects and regarding the classification of types of valves and dampers, linear access valves, roof valves. , fire and composite smoke dampers, anti-explosion dampers, flexible air distribution channels, air distribution terminals and VAV&CAV design principles explained. It should be noted that in this conference, engineer Mohammad Mehdi Altafi, a member of the organization with experience in the field of mechanics, was honored.