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Ships within 48 hours · Estimated delivery Aug 21 - Aug 26
22 gauge galvanized steel roll formed frame
Ceiling opening must be 4” larger in length and width than the nominal duct size
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)
Fan shaped 1/2" spaced louvers
Backdraft Vertical Mount 3550-32X28 Accessories 22 gauge galvanized steel rollh3. 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
US$ 27.50
US$ 20.48
US$ 42.76
