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955 Series Engineering/Performance Data
Note: Sizes listed are the duct or opening size the grille will fit into
Countersunk mounting holes for flush appearance
Square to round 2" collar with roll formed retention bead
* 2650 - Round spring actuated (6) damper for vertical or horizontal mount
3 Hour Out Of Air Fire Door Grille 2663-26X26 T-Bar 955 Series Engineering/Performance Datah3. 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"
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