Opposed Blade Volume Damper 3000-0BD-48X20 Smoke-Fire Damper Note: Sizes are Listed Nominal

Note: Sizes are Listed Nominal Duct Opening

3-way register with stiffened 1/2" fan shaped louvers for silent operation

Mounting holes with color matching 2" baseboard Phillips screws

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 10" Duct Opening (front blades parallel to shortest dimension)

120x120 multiple

Opposed Blade Volume Damper 3000-0BD-48X20 Smoke-Fire Damper Note: Sizes are Listed Nominalh3. 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.