4" 3 Hour Vertical Mount Fire Door 2661-12X12 past 12 months Allows for 4-way airflow

Allows for 4-way airflow

Center margins are mounted on the backside of the grille for a streamlined continuous look

950 Series Submittal

available with two or four diffusers per panel

Heavy gauge steel construction

4" 3 Hour Vertical Mount Fire Door 2661-12X12 past 12 months Allows for 4-way airflowh3. 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"