A fire damper is activated with which type of mechanism?

A fire damper is typically activated by a fusible link. This mechanism is designed to operate automatically in response to temperature increases due to a fire. The fusible link is constructed from materials that melt at specific temperatures; when the ambient temperature exceeds this threshold, the link fails, allowing the damper to close. This closure is crucial because it helps to prevent the movement of fire and smoke through ductwork, thus protecting areas of the building that may not be directly affected by the fire.

The reliance on a fusible link makes this method highly effective in emergency situations, as it does not require any manual intervention or electrical power to function. This automatic operation is critical in maintaining safety during a fire event. In comparison, other options such as manual handles or electrical switches might not provide the same level of immediate response when it is most needed.