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904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 12" Duct Opening (front blades parallel to shortest dimension)
Long throw individually adjustable blades with 1 1/2" blades on 1 1/2" centers or 3" blades on 3" centers
to 23 29/32"
For evaporative cooling or high-velocity exhaust applications
Adjustable Diffuser 950-10X8 past 12 months 904 - Double Deflection AdjustableStandard Features Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern Blades parallel to shortest dimension One piece stamped steel frame on most common sizes, alternate frame is extruded aluminum with signature line marks. Lever operated steel multi shutter damper Designed for ceiling or sidewall applications Nylon bushings on adj. blades prevent metal on metal rattle Countersunk mounting holes for flush appearance with color
