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1600 Series Engineering/Performance Data
1/4" cross bars
Countersunk mounting holes with color matching Philips posi-drive screws
Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern
1x1 T-Bar (10" x 10" duct)
Backdraft Vertical Mount 3550-32X22 Accessories 1600 Series Engineering/Performance Datah3. Standard Features * 3550 Vertical mount * 3560 Horizontal mount air up * 3570 Horizontal mount air down * 3580 Round sizes available 5" to 24" * All non motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out of airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single
