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Ceiling Radiation Damper Local fire codes may require a ventilation fan installed in a fire rated floor/ceiling or a roof/ceiling ...assembly to be equipped with a specially tested and classified radiation damper. In case of a fire, the radiation damper closes to prevent the spread of fire and heat. Panasonic radiation dampers are designed to protect ceiling penetrations in 1, 2 or 3 hour fire-rated floor/ceiling and roof/ceiling designs. All Panasonic radiation dampers meet or exceed the following: UL Classified: Panasonic radiation dampers, assembled together with Panasonic ventilation fans, meet or exceed UL 555C. Quantity and frequency of permissible ceiling penetrations are described in the UL fire resistance directory. National Fire Protection Association (NFPA): Panasonic radiation dampers assembled together with Panasonic ventilation fans, meet or exceed NFPA-90A. For more than 50 years, Panasonic has delighted American consumers with innovations for the home and business. Established in New York City in 1959, Panasonic Corporation of North America was known as Matsushita Electric Corporation of America until 2005 when its company name was changed to strengthen its connection to the brand and the consumer. Throughout its history, Panasonic has made understanding how its products can impact people's lives a core focus for product development and refinement. "Ideas For Life" is a reflection of that commitment and a guiding force for what can be expected from Panasonic in the future. read more

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