Volume Damper Low-Leak OBD 3000-0BDLL-34X20 Residential Registers & Grilles with 75% free area Options

with 75% free area Options 14 GA 304 SS Construction 12 GA (

Field installable bowtie damper with round ring

remove the two center cones as a unit and reposition the six screws

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

Volume Damper Low-Leak OBD 3000-0BDLL-34X20 Residential Registers & Grilles with 75% free area Optionsh3. 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.