Mechanical fire dampers typically activate when heat causes a fusible link to melt. Motorized dampers, including those designed for both fire and smoke control, feature sensors that detect smoke, prompting closure. They can also respond to signals from the external control panel or fire alarm system if linked. This action effectively seals off compartments, confining fire and smoke. However, for this safeguard to be effective, dampers must be accurately installed, regularly maintained, and remain untampered with.