Which fire class should be handled with special extinguishing agents due to the nature of the fuel?

Class K fires are unique because they involve cooking oils and fats, which require specific extinguishing agents that are effective for their combustion characteristics. Regular water or foam agents would not adequately address these types of fires and could even exacerbate the situation. Special extinguishing agents, such as wet chemical agents, are formulated to saponify the burning oils, creating a barrier that prevents re-ignition while effectively cooling the fuel.

Class A fires involve ordinary combustible materials like wood and paper, Class B fires relate to flammable liquids and gases, and Class C fires pertain to electrical equipment. Each of these fire classes has established extinguishing methods that are effective based on their respective fuel types. However, the unique properties of cooking oils in Class K fires necessitate a tailored approach to fire suppression, which is why special extinguishing agents are required for this class.