16×8 CRD-1 Ceiling Radiation Damper, 165 Degree Fusible Link, UL555C

The CRD-1 is a UL555C classified damper designed for protection of ceiling openings in fire rated floor/ceiling assemblies with fire resistance ratings of 3 hours or less. This product can also be applied to steel lay-in style ceiling diffusers up to 24 in. x 24 in. (610mm x 610mm) maximum size when installed with an approved thermal blanket.