What type of dampers are required in HVAC systems that automatically shut down during a fire?

In HVAC systems, static dampers are specifically designed to remain in place and operate passively, providing a crucial role during a fire situation. They automatically close in response to high temperatures or smoke as a means of controlling the flow of air and preventing the spread of smoke and flames through ducts to other areas of a building. This function is vital for maintaining the integrity of fire barriers and containing hazardous conditions within specified zones.

Dynamic dampers, on the other hand, work with varying airflow conditions but are not primarily meant for use during a fire. Regular dampers may not have the specialized construction or materials needed for fire resistance. Adjustable dampers are designed for manual control over air flow but do not serve the automatic closure requirement necessary during fire events. Thus, static dampers are uniquely suited for fire protection in HVAC applications.