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.

Yes it is and the inspector is correct. They can accommodate airflow in either direction. 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. They are undersized to fit inside duct.

Dynamic fire damper styles. Static duct fire dampers. Heavy duty coil spring drives the fire damper curtain closed. Fusible link melts releasing the fire damper curtain.

If your hvac keeps air flowing during an emergency your hvac unit will have a dynamic fire damper. Now a building inspector is telling us we need to install fire dampers in the ductwork that penetrates the deck to the floor above. In the event of a fire these dampers automatically stop airflow through duct. They are also recommended for use in duct systems or penetrations of fire rated barriers designed to have pressurized airflow when dampers cycle closed during a fire.

According to nfpa 90a 2012 section 5 3 2 1 where air ducts extend through only. These fire smoke dampers are designed for use in hvac systems requiring emergency fire smoke control. Static fire dampers are used in applications where the fans shut down during fire and smoke control. We are installing a new hvac system in the basement of the hospital.

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.