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Ventilation Fans - Project Packs Broan® Radiation/Fire Damper Fan Project Pack A fire resistant screen automatically closes when excessive heat is detected. The breakaway fusible link triggers the closing of the radiation damper’s fire resistant screen to prevent smoke and fire from traveling through the ductwork. UL Classified (UL Standard 555C) for use in 1-, 2- or 3-hour fire rated floor-ceiling designs. 8" x 10" x 8-3/4" high housing with 4" metal duct connector. All models offered as project packs. Finish Pack, 110 CFM Blower, 4.0 Sones, with Metal Grille. To be used with Model RDH housing pack. Dimensions: 1.83333"L x 1"W x 1.08333"H
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