Commonly used for supply, air grille directs the air using its adjustable blades in a horizontal, as well as vertical direction.  It is designed for air supply and air extract.  With one or two rows of adjustable blades.  For a balanced distribution of air through the entire diffusion grille it is recommended to use a damper or a plenum box.  It is adequate for usage in such premises that require a higher emphasis on appearance.  Single Deflection Air Grille is a single row of blades that can be adjusted in two directions while Double Deflection Air Grille is double row of blades that can be adjusted in four directions.  Available in square, rectangular or round design.  Can be made of Galvanized Iron, Aluminum, Stainless Steel.