CRD-1
The CRD-1 is a UL555C classified damper designed to limit the radiant heat transfer through an opening in the ceiling membrane of a fire-resistance rated floor/ceiling assembly of three hours or less.
International Building Code (IBC)
National Fire Protection Association (NFPA 90A and 101)
Certifications:
California State Fire Marshal (CSFM) Listing #3225-0981:0101
UL 555C (Listing #R13446)
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CRD-1
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