3 Hour Out Of Air Fire Door Grille 2663-36X20 T-Bar For damper free area chart

For damper free area chart A click here * 2563 - Out-of-Airstream fire door

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

with 75% free area Options 14 GA 304 SS Construction 12 GA (

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3 Hour Out Of Air Fire Door Grille 2663-36X20 T-Bar For damper free area charth3. 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"