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Fire & Smoke Dampers
Fire and smoke dampers automatically close when temperatures reach a certain point to prevent the spread of smoke and fire through the duct system. They use a fusible link that melts above a specific temperature, releasing a spring-loaded damper or blade that blocks smoke and fire from moving through the duct.
Rectangular Fire Dampers
Rectangular fire dampers have a fusible link that triggers above a specific temperature and closes shut using spring-loaded blades or gates. They eliminate the spread of fire through the HVAC systems.
Static
Static dampers will close in the event of a fire but cannot overcome the blower airflow. If the HVAC system shuts down during a fire, these are suitable. If the HVAC system stays active during a fire, dynamic fire dampers are recommended.
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Dynamic
Dynamic dampers will close in the event of a fire, even if the HVAC system is operating. They feature mechanisms that are strong enough to close the damper and stay closed, even with the blower running at full speed.
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