Fire Damper In Hvac Duct

Dampers meet ul 555 fire safety standards to help prevent the spread of fire for 1 hours.

Fire damper in hvac duct.

Static fire dampers can be used in both vertical and horizontal positions. In the event of a fire these dampers automatically stop airflow through duct. They have a fusible link that melts at 165 f releasing a spring and causing the blades to close. Fire dampers are ul555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems designed to close upon the detection of heat.

Static fire dampers are used in applications where the fans shut down during fire and smoke control. However in situations where the hvac fans shut down when smoke is detected or a fire alarm is triggered experts will install a standard damper also known as a static fire damper in your air ducts. According to nfpa 90a 2012 section 5 3 2 1 where air ducts extend through only. Now a building inspector is telling us we need to install fire dampers in the ductwork that penetrates the deck to the floor above.

Fusible link melts releasing the fire damper curtain. These fire smoke dampers are designed for use in hvac systems requiring emergency fire smoke control. Yes it is and the inspector is correct. Dynamic duct fire dampers.

They are undersized to fit inside duct. Dynamic fire damper styles. If your hvac keeps air flowing during an emergency your hvac unit will have a dynamic fire damper. Static duct fire dampers.

Heavy duty coil spring drives the fire damper curtain closed.