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Install with louvers in up or down position for best duct concealment
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws
Allows for 2-way airflow
Opposed Blade Volume Damper 3000-0BD-30X30 Residential Registers & Grilles Install with louvers in uph3. 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.
