Assemblies that were tested with a generic hinged door style damper may use any UL 555C listed ceiling radiation dampers (examples: CRD-1, CRD-2, or CRD-60). They are typically installed in non-combustible ceiling design (i.e., steel truss) using a fire rated T-bar grid system.

Some floor or roof/ceiling assemblies are tested with manufacturer specific dampers that are specifically listed in the listing agency’s Product Directory. These are typically installed in combustible ceiling designs (i.e., wood joists or wood trusses) using a fire rated gypsum ceiling assembly.

Refer to UL Product Directory for rated assembly details.