Opposed Blade Volume Damper 3000-0BD-56X24 Residential Registers & Grilles Standard Features * Return air

Standard Features * Return air T-Bar lay-in filter grille for 20" x 20" duct * Removable louvered 20 gauge steel face * 20" x 20" x 1" filter (not included) * Square collar (20x20) * 2x2 panel * Seismic support holes * Soft White Options * Square to round No Labor Collar

Available in 4" through 29" round

Standard Features * 2533 - Square or rectangular for vertical mount only

For damper free area chart A click here * 2563 - Out-of-Airstream fire door

Surface mount fixed blade grille with airfoil blades at 0°

Opposed Blade Volume Damper 3000-0BD-56X24 Residential Registers & Grilles Standard Features * Return airh3. 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.