4" Round Vertical Mount Fire Damper 2649-6 Step Down Ceiling Diffuser Double deflection surface mount grille

Double deflection surface mount grille with adjustable airfoil blades

Dampers above 80 square inches free area will be provided with blade insulation

Standard Features * Return air T-Bar lay-in filter grille * Removable louvered 20 gauge steel face * 20" x 20"x 1" filter (not included) * 7/8" fiberglass back plenum cut holes 6"-16" (collar by others) * Seismic support holes * Soft White

with 53% free area

4" Round Vertical Mount Fire Damper 2649-6 Step Down Ceiling Diffuser Double deflection surface mount grilleh3. 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