Ul rated fire smoke and ceiling radiation dampers dynamic 1 1 2 hr rated. The first paragraph stayed the same all this was added. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly.
Model Sp L Is A Restroom Exhaust Fan That Can Eliminate The Need For A Ceiling Radiation Damper Models Rated 5 Air Ventilation Exhaust Fan Facility Management
