Model CFD-521-NP90 1 hour - ceiling radiation damper field installed 90° plenum - butterfly style blade


The CFD-521-NP90 ceiling radiation damper employs butterfly style blades for point-of-origin control of radiant heat in HVAC systems. The CFD-521-NP90 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. The CFD-521-NP90 must have a field supplied outlet box installed on it.