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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13
3/4” Wide x 3/4” High square holes
22 gauge butterfly style galvanized steel blades
Standard Features * Steel honeycomb construction * Flush core and frame provides smooth surface * Free area equals more than 75% of nominal size * Driftwood Tan Options * Mounting holes for sidewall and ceiling application * 1600R - reinforced welded core and extra supports for heavy duty application * Standard Color
Maximum size 14"x14"
Standard Features * 2533 - Square or rectangular for vertical mount only
Backdraft Vertical Mount 3550-18X36 Step Down Ceiling Diffuser 3/4” Wide x 3/4” Highh3. 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
