What triggers the activation of the halon fire extinguisher in the LAV?

The activation of the halon fire extinguisher in the LAV is triggered by heat-sensitive capsules melting. These capsules are designed to respond to increases in temperature that are indicative of a fire. When the heat reaches a specific threshold, the capsules melt, which activates the extinguisher system and allows the halon to be dispersed in the area to suppress the fire effectively. This automated response helps ensure quick and efficient action against fire hazards, enhancing the safety of personnel on board without requiring manual intervention, which may not always be feasible in an emergency situation.