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Concealed mounting holes with mounting screws
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)
Sleeve Submittal
Designed to handle high volumes of air with horizontal flow
Square collar designed for 22" x 22" duct
Opposed Blade Volume Damper 3000-0BD-70X14 Smoke-Fire Damper Concealed mounting holes with mountingh3. 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.
