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floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
18" or 24" lengths * Soft White Options * Standard Color or Designer Color Finish available on this product
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
Back blades are parallel to the longest dimension
Volume Damper Low-Leak OBD 3000-0BDLL-60X16 Accessories floors and partitions with fireh3. 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.
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