Model CFD-521-IP 1 hour - ceiling radiation damper R-6.5 or 8.7 insulated duct board outlet box - butterfly style blade


The CFD-521-IP ceiling radiation damper employs butterfly style blades for point-of-origin control of radiant heat in HVAC systems. The CFD-521-IP is installed horizontally in the ceiling membrane of combustible floor-ceiling or roof-ceiling assemblies with fire resistance ratings up to and including 1 hour.