Khedr Model FBD is a continuous slot system which allows the air distribution to become inconspicuous, while fully integrating and complementing the ceiling system and other ceiling components · Khedr Model FBD satisfy both the architect’s and engineer’s requirements for designing an air distribution system that will maintain optimum room air conditions while being inconspicuous to the viewer. · Khedr Model FBD are found also mitered and curved section with different bar thickness .