Where should smoke dampers be installed?
Where should smoke dampers be installed?
Smoke dampers do not have to be installed in sleeves – they can be installed directly into the duct. However the joints between the damper frame and the duct must be sealed. This is to prevent any air leakage.
What is the difference between smoke dampers and fire dampers?
A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke. It is UL leakage-rated to stop smoke in its tracks, which is a main difference from fire dampers.
Can smoke dampers and fire dampers be combined?
A smoke damper can also be installed within the duct, and is activated by a signal from a smoke detector within the damper. Upon detection of smoke, the actuator will automatically close the damper components. A combination fire/smoke damper will close upon detection of EITHER fire or smoke.
Where are fire dampers used?
Fire Dampers are used in air transfer openings, ducts and other places where fire rated structures (e.g. walls, floors or other fire barriers) are penetrated.
What is the purpose of smoke fire dampers?
Smoke dampers are passive fire protection products used in air conditioning and ventilation ductwork or installed in physical smoke barriers (e.g., walls). This may be done to prevent the spread of smoke from the space of fire origin to other spaces in the same building.
Are fire dampers active or passive?
Fire and smoke dampers – installed where ducts from the heating, ventilation or air conditioning system passes through walls or floors and can help prevent the spread of a fire, although these may be activated by an active system e.g. a fire and smoke damper linked to the main fire alarm system.
Are smoke dampers powered?
Smoke dampers are operated by either a factory-installed elec- tric or a pneumatic actuator. They are controlled by smoke detectors and/or fire alarms.
How often should smoke dampers be tested?
every four years
NFPA 105 provides requirements for smoke damper testing. It requires testing and inspection of the damper one year after installation and every four years after that, except in hospitals, in which the frequency is every six years.
Where to buy fire dampers and smoke dampers?
BROUGHT TO YOU BY WEBREPS Wholesale HVAC Store for Contractors & Businesses All types of Fire Dampers, Fire & Smoke Dampers, Radiation Dampers, and Dynamic Dampers. Made to your size and specifications! SHOP NOW! 800-810-3280
What are dampers used for in HVAC systems?
A complete line of damper products for fire and smoke control in life safety systems and for airflow control in commercial HVAC and industrial systems. Damper products serve a valuable role in air movement. Products cover a wide variety of applications ranging from life safety to maintaining the control of outside air.
What happens in the event of a dynamic fire damper?
In the event of a fire, the HVAC system where the dynamic fire dampers are placed will continue to operate. Since a dynamic fire damper will need to shut against circulating air, they have built-in fans that turn on to activate the spring-loaded system.
How does a thermo sensitive fire damper work?
Built with a galvanized steel frame, a fusible link or a thermo sensitive device (ETL – usually set at 165° F). If the fusible link opens, the Fire Damper will release the damper components to close. Once the components close the Fire dampers will stop the transfer of fire from one room to another.