3 Hour Out Of Air Fire Door Grille 2663-48X32 Commercial Square to round 2" collar

Square to round 2" collar with roll formed retention bead - available in square sizes only

3/16” holes on 1/4” staggered centers Extruded aluminum frame with signature line marks Perforated material 58% free area Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws Rust resistant pre-coat with durable powder finish Soft White

Available in 4" through 29" round

CSFM California State Fire Marshal listed

Note: Sizes are Listed Nominal Duct Opening

3 Hour Out Of Air Fire Door Grille 2663-48X32 Commercial Square to round 2" collarh3. 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"