Volume Damper Low-Leak OBD 3000-0BDLL-46X12 Step Down Ceiling Diffuser Blades parallel to shortest dimension

Blades parallel to shortest dimension

2" ADC compliant round collar with a bead for ease of installation

to 23 29/32"

Flush core and frame provides smooth surface

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

Volume Damper Low-Leak OBD 3000-0BDLL-46X12 Step Down Ceiling Diffuser Blades parallel to shortest dimensionh3. 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.