2" Round 3 Hour Vertical Fire Door 2565-34 Smoke-Fire Damper Center margins are mounted on

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

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 4" Duct Opening  (front blades parallel to shortest dimension)

inner dimension and outside dimension sizes available * Tamper proof screws * Standard Color

Standard Features * T-Bar lay-in panel with perforated face * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar attached to panel * Soft White Options * 105 P D - multi-shutter damper with hinged perforated face * 105 P O - opposed blade damper with hinged perforated face * TVB - Thermal Vapor Blanket * Square collar

7/8” Wide x 7/8” High square holes

2" Round 3 Hour Vertical Fire Door 2565-34 Smoke-Fire Damper Center margins are mounted onh3. Standard Features * 2561 Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 Round fire door for vertical mount only. Available 4" thru 40" round. * UL and California State Fire Marshall approved * 2" thinline frame *