4" Round Vertical Mount Fire Damper 2649-8 Commercial Fractional Sizes

Fractional Sizes

with 54% free area

Blades parallel to shortest dimension

Standard Features * Fixed airfoil blades parallel to 1st dimension given *

2" thin-line roll formed out-of-airstream frame

4" Round Vertical Mount Fire Damper 2649-8 Commercial Fractional Sizesh3. 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