3 Hour Out Of Air Fire Door Grille 2663-40X40 past 12 months 14 GA 304 SS Construction

14 GA 304 SS Construction

Long throw individually adjustable blades with 1 1/2" blades on 1 1/2" centers or 3" blades on 3" centers

listed Fire-Resistance Diffusers * TVB - Thermal Vapor Blanket * Square collar

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 4" Duct Opening  (front blades parallel to shortest dimension)

3 Hour Out Of Air Fire Door Grille 2663-40X40 past 12 months 14 GA 304 SS Constructionh3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"