Backdraft Vertical Mount 3550-28X30 Residential Registers & Grilles Delivers supply air in a

Delivers supply air in a 360° air pattern

91 Series Submittal

Standard Features * Individually adjustable curved blade T-Bar lay in diffuser with concealed hinges * Hinged perforated face * Spring push release for easy access to adjust curved blades * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar sizes: 6-10"

REVIT FILES

3 cone steel diffuser with hinged core for easy duct access

Backdraft Vertical Mount 3550-28X30 Residential Registers & Grilles Delivers supply air in ah3. 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