Dynamic Fire Dampers
Dynamic (Fans On) Fire dampers are UL555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems, designed to close upon the detection of heat.
FDD-B
Curtain Fire Damper - 1-1/2 & 3 Hour - Dynamic -Style B - Optional Sleeve
Product Overview
Model FDD-B is a dynamic curtain fire damper Style B (blade out of the air stream).
- Dynamic Rated to 2,000 fpm and 4” w.g.
- Installation in walls or masonry floors
- 1 ½ Hour Rating (less than 3 hours assemblies)
- Optional 3 Hour Rating (fire rating of 3 hours and longer)
- UL 555 File #R25410, ULC S112
- Optional Sleeve of Various Lengths and Gauges
