Volume Damper Low-Leak OBD 3000-0BDLL-70X52 Step Down Ceiling Diffuser Allows for 4-way airflow adjustment

Allows for 4-way airflow adjustment

PERFORMANCE DATA 845 Series Engineering/Performance Data

Standard Features 1” rim size (2” larger than nominal duct size / order size) 14 gauge steel construction Countersunk mounting holes for a flush appearance 1-27/32” Wide x 11/32” High slots on staggered centers

904 - Double Deflection Adjustable Aluminum Blade Grille For a 38" x 18" Duct Opening (front blades parallel to shortest dimension)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening  (front blades parallel to shortest dimension)

Volume Damper Low-Leak OBD 3000-0BDLL-70X52 Step Down Ceiling Diffuser Allows for 4-way airflow adjustmenth3. 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.