What is the primary function of fire dampers in ductwork?

The primary function of fire dampers in ductwork is for smoke and fire control. Fire dampers are integrated into HVAC duct systems to prevent the spread of fire and smoke between different areas of a building. When a fire occurs, these dampers automatically close, effectively blocking the flow of fire and smoke through the ductwork, thereby protecting other compartments within the building and enhancing overall life safety.

This feature is crucial in maintaining the integrity of fire-rated walls and ceilings, which are designed to contain a fire in one area, allowing for safe evacuation and minimizing property damage. The mechanism relies on temperature-sensitive materials that activate the damper upon detecting high temperatures associated with a fire.

While enhancing airflow efficiency, reducing noise levels, and filtering air pollutants are important functions associated with HVAC systems, they do not relate to the primary safety role that fire dampers serve in protecting life and property from fire hazards.