Volume Damper Low-Leak OBD 3000-0BDLL-32X18 Step Down Ceiling Diffuser 1 1/2 hour fire resistance

1 1/2 hour fire resistance rating

RS52 Series Engineering/Performance Data

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 14" Duct Opening (front blades parallel to shortest dimension)

Square or rectangular for vertical mount only

Designer Color or Satin Anodized Finish available on this product

Volume Damper Low-Leak OBD 3000-0BDLL-32X18 Step Down Ceiling Diffuser 1 1/2 hour fire resistanceh3. 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.