Greenheck Model GFSD-211 and GFSD-212 out-of-wall combination fire smoke dampers are designed for easy access through the grille to the damper, closure device and actuator. A separate compartment houses the actuator, allowing for a shallow operating depth of 13.5 inches. Both models are qualified to velocities up to 2000 fpm and pressure ratings up to four inches wg. They are available in vertical or horizontal mounts with a maximum size of 48 inches x 48 inches.
