Fire Damper In Hvac Duct
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Fire Dampers Is A Device Introduced In Ducts And Air Transfer Opening Of An Air Distribution Or Smoke Control System Intended To Close Endless Supply Of Warmth
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In the event of a fire these dampers automatically stop airflow through duct.
Fire damper in hvac duct. 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. They are undersized to fit inside duct. These fire smoke dampers are designed for use in hvac systems requiring emergency fire smoke control. If your hvac keeps air flowing during an emergency your hvac unit will have a dynamic fire damper.
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. Now a building inspector is telling us we need to install fire dampers in the ductwork that penetrates the deck to the floor above. Dynamic duct fire dampers. Fusible link melts releasing the fire damper curtain.
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. Heavy duty coil spring drives the fire damper curtain closed. According to nfpa 90a 2012 section 5 3 2 1 where air ducts extend through only.
Static fire dampers can be used in both vertical and horizontal positions. Dampers meet ul 555 fire safety standards to help prevent the spread of fire for 1 hours. They have a fusible link that melts at 165 f releasing a spring and causing the blades to close. Static duct fire dampers.
They can accommodate airflow in either direction.
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