4" 3 Hour Vertical Mount Fire Door 2661-48X30 Residential Registers & Grilles 2" thin-line roll formed out-of-airstream

2" thin-line roll formed out-of-airstream frame

Available 6

Fits 1x1 ceiling grids (collar size 6"-10")

904 - Double Deflection Adjustable Aluminum Blade Grille For a 14" x 10" Duct Opening (front blades parallel to shortest dimension)

Hinged removable face with hinges parallel to longest side

4" 3 Hour Vertical Mount Fire Door 2661-48X30 Residential Registers & Grilles 2" thin-line roll formed out-of-airstreamh3. 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"