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Surface mount fixed blade grille with airfoil blades at 0°
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 12" Duct Opening (front blades parallel to shortest dimension)
UL listed and tested in accordance with UL Standard 555
Performance Data With Opposed Blade Damper
Double deflection surface mount grille with adjustable airfoil blades
Opposed Blade Volume Damper 3000-0BD-66X60 T-Bar Surface mount fixed blade grilleh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3.
