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-SB
Curtain Fire Damper - 1-1/2 & 3 Hour - Dynamic - Style B - Integral Sleeve
Product Overview
Model FDD-SB is an integral sleeve Style B (blade out of the air stream) dynamic curtain fire damper.
- Dynamic Rated to 2,000 fpm and 4” w.g.
- 12” Long Integral Sleeve
- 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
