Volume Damper Low-Leak OBD 3000-0BDLL-64X60 Commercial Ceiling opening must be 4”

Ceiling opening must be 4” larger in length and width than the nominal duct size

Steel construction

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 30" Duct Opening (front blades parallel to shortest dimension)

stair risers

Standard Features * 3-way diffusion for draft-free heat or air conditioning * For ceiling or sidewall applications * All component parts

Volume Damper Low-Leak OBD 3000-0BDLL-64X60 Commercial Ceiling opening must be 4”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.