3 Hour Out Of Air Fire Door Grille 2663-36X34 Step Down Ceiling Diffuser * 2534 - Square or

* 2534 - Square or rectangular spring actuated (6) for horizontal or vertical mount

smooth style * 360 air diffusion * Excellent for variable air volume applications * Hinged-down core for easy access * No Labor Collar * Seismic support hangers * Available sizes: 6"-10"

Heavy gauge cold roll steel

listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar Additional Drawings * 825 MA

Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws

3 Hour Out Of Air Fire Door Grille 2663-36X34 Step Down Ceiling Diffuser * 2534 - Square orh3. 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"