Many codes require that exhaust fans installed in multi-family fire-rated ceilings must be protected by dampers, which, in case of fire, protect against the spread of heat and flame. NuTone offers a variety of radiation fire damper solutions to meet most any need. When the air temperature passing through the damper exceeds 165°F the fusible link melts, triggering the thermal fabric to automatically close across the damper. Airflow is interrupted by a flame and heat barrier, preventing the rapid spread of fire to other areas.For use in 1, 2 and 3 hour rated floor-ceiling and roof-ceiling constructions Galvanized steel frame High temperature, non-asbestos, reinforced fiber thermal fabric Stainless steel closure springs 165°F fusible link Same grilles that come with standard fans and fan lights can be used
