4" 3 Hour Vertical Mount Fire Door 2661-24X14 past 12 months Performance Data With Opposed Blade

Performance Data With Opposed Blade Damper

Standard Features * Designed for return or exhaust applications * 3/16" holes on 1/4" staggered centers * Heavy gauge steel * Seismic support holes * 1x2

Field installable bowtie damper with round ring

* UL and California State Fire Marshall approved * 4-1/4" standard frame style * Maximum dimension 60w

4" 3 Hour Vertical Mount Fire Door 2661-24X14 past 12 months Performance Data With Opposed Bladeh3. 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"