Pay in 4 interest-free payments of $46.63 Learn more
Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
with 54% free area
53% free area * 1306: 3/4" lattice opening
Surface mount fixed blade grille with airfoil blades at 0°
CB30 - three way
1-27/32” x 11/32” slots
Backdraft Vertical Mount 3550-20X20 Commercial with 54% free areah3. 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
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