3 Hour Out Of Air Fire Door Grille 2663-36X20 T-Bar T-Bar Modular Core Diffuser with

T-Bar Modular Core Diffuser with Round Collar 18-20

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

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1/2” Wide x 1/2” High square holes

SUBMITTAL 600TFG Series Submittal

3 Hour Out Of Air Fire Door Grille 2663-36X20 T-Bar T-Bar Modular Core Diffuser withh3. 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"