4" Round Vertical Mount Fire Damper 2649-48 Residential Registers & Grilles 53% free area * 1306:

53% free area * 1306: 3/4" lattice opening

Hinged perforated face with screwdriver access to release

102 - two way

Holds up to a 2" filter (not included) with filter retention tabs (FG2)

Double deflection radius mount spiral pipe grille with adjustable blades

4" Round Vertical Mount Fire Damper 2649-48 Residential Registers & Grilles 53% free area * 1306:h3. Standard Features * 2649 Round damper for vertical mount only. Available 4" thru 52" round. * 2650 Round spring actuated (6) damper for vertical or horizontal mount. Available 4" thru 52" round. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G 90) * Self locking