Opposed Blade Volume Damper 3000-0BD-56X18 Residential Registers & Grilles 165° standard * All sizes

165° standard * All sizes utilize one main curtain stay * Galvanized finish h3

904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)

Powder coat finish

212° Fusible Link

For damper free area chart B click here * 2665 - Round fire door for vertical mount only

Opposed Blade Volume Damper 3000-0BD-56X18 Residential Registers & Grilles 165° standard * All sizesh3. 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.