What type of system utilizes chemical agents to suppress Class K fires?

Wet chemical suppression systems are specifically designed to combat Class K fires, which involve cooking oils and fats. This type of system employs specialized chemical agents that can effectively cool and saponify the substances involved in a Class K fire, creating a barrier that prevents re-ignition.

The wet chemical agents work by rapidly reducing the heat of the fire and forming a thick foam surface on the burning oil, which smothers the flames and cuts off the oxygen supply. This approach not only suppresses the fire effectively but also protects against fire flare-ups that are common with cooking oils.

Using water or foam systems on Class K fires can be ineffective and dangerous, as water can cause the hot oil to splatter and spread the flames, and foam products are not designed to handle the unique combustion properties of cooking oils. Gas-based systems likewise are not tailored for Class K fires, as they typically require a different approach to extinguishment. Therefore, the wet chemical suppression system is recognized as the most effective solution for these types of fires, making it the correct choice.