What is the primary use for a Class K fire extinguisher?

A Class K fire extinguisher is specifically designed for fires involving cooking media, particularly those that occur in kitchens due to oils and fats, such as vegetable oils or animal fats. The effectiveness of these extinguishers lies in their ability to cool the flames while also preventing re-ignition of the fire, which is a common issue with cooking oil fires.

Unlike extinguishers that are used for electrical fires or flammable liquids, which consider different properties of the fuels involved, Class K extinguishers contain agents like potassium acetate, which effectively extinguish hot oil fires. While the other options list types of fires that require different classifications of extinguishing agents, Class K is uniquely tailored for the unpredictability and high temperatures associated with cooking media.