The CFDR5 is a Round, UL555C Classified Ceiling Fire Damper. It features:
- Galvanized steel construction.
- Fusible Link which is included at no extra charge.
- The Diffuser Radiation Shield, which allows any manufacturer's lay-in style steel ceiling diffuser (subject to gage and dimension limitations) to be installed in UL Classified F/C or R/C assembly with Fire Resistance Ratings of 3 hours or less.