Volume Damper Low-Leak OBD 3000-0BDLL-28X20 Step Down Ceiling Diffuser Step down core designed for

Step down core designed for 4-way uniform air distribution

*Pricing is based on standard 14 GA steel construction

Airfoil blades individually adjustable on 3/4" centers

1-27/32” x 11/32” slots

Modern step-down design with 4-way air diffusion

Volume Damper Low-Leak OBD 3000-0BDLL-28X20 Step Down Ceiling Diffuser Step down core designed forh3. 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.