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Square collar designed for 22" x 22" duct
14" * Soft White Options * Field installable Bowtie Damper (BD) * TVB - Thermal Vapor Blanket * HVD - Hinge Down Face
To adjust diffuser
stair risers
Double deflection radius mount spiral pipe grille with adjustable blades
Volume Damper Low-Leak OBD 3000-0BDLL-48X16 Residential Registers & Grilles Square collar designed for 22"h3. 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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