Backdraft Vertical Mount 3550-16X16 Commercial Louvers designed with rolled rib

Louvers designed with rolled rib for maximum strength and rigidity

Standard Features * Designed for return or exhaust applications * 3/16" holes on 1/4" staggered centers * Heavy gauge steel * Seismic support holes * 1x2

Available 4" thru 28" round

Tamper-proof Screws

Holds up to a 1" filter (not included) with filter retention tabs (FG1)

Backdraft Vertical Mount 3550-16X16 Commercial Louvers designed with rolled ribh3. 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