Volume Damper Low-Leak OBD 3000-0BDLL-28X20 Step Down Ceiling Diffuser Standard Features * Extruded aluminum

Standard Features * Extruded aluminum construction * 45 fixed blades parallel to longest dimension * Margin edges are 7/8" projection for baseboard installation * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 1100FF - flush frame * Fractional and odd dimension sizes * Standard Color

14" and 16" * Soft White Options * Field installable Bowtie Damper (BD) * FTD - Fixed T-Bar Diffuser (6"

Step down core designed for 4-way uniform air distribution

Standard Features * Full size fixed bar blade T-Bar lay-in return air grille *

Curved saddle with gasket provides airtight fit to spiral pipe

Volume Damper Low-Leak OBD 3000-0BDLL-28X20 Step Down Ceiling Diffuser Standard Features * Extruded aluminumh3. 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.