EFS Multi-Blade smoke damper is rated as Leakage Class I Smoke damper for up to 350°F. For use in dynamic systems, per SI 1001 part 4 (UL 555S).
As a life safety damper it has a failsafe design which enables the damper to automatically close upon the smoke detection or loss of power.
EFS damper provides a low pressure drop design, qualified to 2,000 fpm (10.2 m/s) / 4.0 in. WC (1.0 kPa) and can be installed in vertical walls and partitions, or horizontally in floors or assemblies.order inquiry