Which type of dampers should be used in HVAC systems during a fire?

The most appropriate type of dampers to use in HVAC systems during a fire incident are fire dampers and ceiling radiation dampers. Fire dampers are specifically designed to prevent the spread of fire and smoke within the ductwork of an HVAC system. They automatically close when heat reaches a certain temperature, effectively sealing off the area from any flames or hot gases trying to escape.

Ceiling radiation dampers, on the other hand, are installed in ceilings with fire-resistive ratings and help protect penetrations through fire-rated ceilings. They serve to maintain the integrity of the fire-resistance rating during a fire by preventing the passage of heat.

Using both types of dampers provides a comprehensive approach to fire safety in HVAC systems, ensuring that both fire spread and heat transmission are effectively managed. This makes them essential for maintaining safety and compliance with fire codes in building design and operation.