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Center margins are mounted on the backside of the grille for a streamlined continuous look
For evaporative coolers or central blower systems
Standard Features * 2601 - Square or rectangular for vertical mount only
Hinged removable door with hinges parallel to the longest dimension
Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension
Volume Damper Low-Leak OBD 3000-0BDLL-70X44 Smoke-Fire Damper Center margins are mounted onh3. 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.
