What type of system is specifically mentioned as a part of the automatic fire extinguishing systems?

Foam systems are specifically recognized as a type of automatic fire extinguishing system due to their effective suppression capabilities, particularly in combating flammable liquid fires. These systems use a mixture of foam concentrate, water, and air to create a blanket of foam that smothers the fire, cutting off its oxygen supply and preventing re-ignition. This characteristic makes foam systems vital in environments such as industrial facilities, where flammable liquids may pose a significant fire risk.

In contrast, manual hose systems rely on human operation to extinguish fires and do not automatically activate when a fire is detected. Smoke extraction systems function to remove smoke from an area but are not designed for extinguishing fires. Emergency lighting systems, on the other hand, are intended to provide illumination during emergencies but have no role in fire extinguishment. The distinction is important in fire protection systems as it highlights the specific function of each type within the realm of fire safety and suppression.