Volume Damper Low-Leak OBD 3000-0BDLL-54X12 Step Down Ceiling Diffuser 1x1 T-Bar (10" x 10"

1x1 T-Bar (10" x 10" duct)

69% free area * 1308: 7/8" lattice opening

Hinged removable door with hinges parallel to the longest dimension

Note: Sizes are Listed Nominal Duct Opening

Volume Damper Low-Leak OBD 3000-0BDLL-54X12 Step Down Ceiling Diffuser 1x1 T-Bar (10" x 10"h3. 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.