On-Line Catalog : Ceiling Radiation Dampers > Wood Truss > CFD-521-IP
Model CFD-521-IP 1 hour — ceiling radiation damper
R-6.5 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.