4" Round Vertical Mount Fire Damper 2649-36 past 12 months Square collar designed for 20”

Square collar designed for 20” × 20” duct

Diffuser available in sizes 6×6 through 20×20

Locking screw to hold damper in place

available with two or four diffusers per panel

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

4" Round Vertical Mount Fire Damper 2649-36 past 12 months Square collar designed for 20”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