Backdraft Vertical Mount 3550-24X24 T-Bar 3/16” crossbars

3/16” crossbars

AA-HVL Series Engineering/Performance Data

Available in 6”–12” collar sizes

Countersunk mounting holes for flush appearance

Standard Features * 1 1/2 hour rated fire damper * 2549 - Round damper for vertical mount only

Backdraft Vertical Mount 3550-24X24 T-Bar 3/16” crossbarsh3. 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