Sterling Fire Radiation Damper For SE, SED, With Light ,SEL,SEDL, RDF3-2

Sterling fire radiation damper for SE, SED, with light, SEL, SEDL, RDF3-2 the Fire radiation damper is designed to automatically seal of fan and duct st fire rated ceiling Once the fan exceeds the ceiling design heat capacity the radiation damper fusible link breaks and the fire rated folding ceramic cloth door closes. This prevents the excessively hot air entering the dwelling spaces. For use in rated floor ceiling and roof-ceiling construction ETL listed (UL 555C Standard) Ceramic Fibre with fiberglass cover Roll Formed frame 22ga. Galvanized Steel Meets NFPA 90 BOCA,SBCCA and UBC requirements.