2" 3 Hour Vertical Mount Fire Door 2561-20X16 Accessories Provides 4-way air flow on

Provides 4-way air flow on one plane

904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)

remove the two center cones as a unit and reposition the six screws

Directional volume diffuser with 4-way removable core

2" 3 Hour Vertical Mount Fire Door 2561-20X16 Accessories Provides 4-way air flow onh3. Standard Features * 2561 Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 Round fire door for vertical mount only. Available 4" thru 40" round. * UL and California State Fire Marshall approved * 2" thinline frame *