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listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar
Locking screw to hold damper in place
Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper
2500/2600 Installation Instructions
4" Round Vertical Mount Fire Damper 2649-22 Smoke-Fire Damper listed Fire-Resistance Diffuser * TVBh3. 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
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