aschwartz

Dynamic Ceiling Radiation Dampers

Discussion created by aschwartz on Apr 18, 2017

Is a dynamic radiation damper CRD required for the duct leaving the air handling unit and entering the UL521 Ceiling assembly? UL521 doesn't list dynamic fire dampers for protection of the assembly, and radiation dampers are not listed for dynamic use. What is the intent of UL521 and protection of the ceiling assembly?

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