CRD-300WT – Ceiling Radiation Damper, For Use with Greenheck SP-AP or SP-LP Fans

The CRD-300WT series dampers are classified to function as a heat barrier in air handling penetrations through fire resistive membrane ceilings. They are intended to maintain the fire resistive integrity of the ceiling. They can only be installed in conjunction with the SP-AP or SP-LP fan models shown and cannot be installed alone.