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Mounting Holes - Designed for ceiling or sidewall application
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)
SUBMITTAL RS52 Series Submittal
AA-HVL Series Engineering/Performance Data
Powder coat finish
Backdraft Vertical Mount 3550-24X24 T-Bar Mounting Holes - Designed forh3. 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
