Volume Damper Low-Leak OBD 3000-0BDLL-30X22 Step Down Ceiling Diffuser Countersunk mounting holes with color

Countersunk mounting holes with color matching Philips Pozidriv screws

904 Series Performance Data

Smoke Test and More Information on MA Series Diffusers

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

Standard Features * Converts T-bar products to surface mount * Sizes available: 1x2

Volume Damper Low-Leak OBD 3000-0BDLL-30X22 Step Down Ceiling Diffuser Countersunk mounting holes with colorh3. 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.