Corridor Fire Smoke Dampers
Corridor fire smoke dampers UL 555 1 hour corridor ceiling fire rating and UL 555S classified
Corridor Fire Smoke Dampers
Corridor fire smoke dampers UL 555 1 hour corridor ceiling fire rating and UL 555S classified

The corridor combination fire smoke damper is UL 555 and UL 555S classified to protect corridor/ceiling penetrations as required. The damper installs above grilles or diffusers and has a fire rating of one hour.