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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
inner dimension and outside dimension sizes available * Tamper proof screws * Standard Color
INSTALLATION INSTRUCTIONS
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 12" Duct Opening (front blades parallel to shortest dimension)
Standard Features * Steel construction * Generous free area for quiet operation * Lever operated single-blade damper * Removable face and damper * Tension wings to stabilize damper * Available in 15"
Volume Damper Low-Leak OBD 3000-0BDLL-30X20 Smoke-Fire Damper inner dimension and outside 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.
