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.
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Manchester, NH - 20
|Manufacturer||Greenheck Fan Corporation|