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904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 10" Duct Opening (front blades parallel to shortest dimension)
Narrow ceiling grid dimples for 9/16" T-Rails
SUBMITTALS
* 2634 - Square or rectangular Spring actuated (6) out-of-airstream fire damper for horizontal or vertical mount
Backdraft Vertical Mount 3550-24X28 Specialty Products 904 - Double Deflection Adjustableh3. 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$ 200.66
US$ 200.07
