Which fire extinguisher classification is suitable for kitchen fires involving grease?

The classification of fire extinguishers is designed to tackle different types of fires based on their fuel source. Kitchen fires typically involve cooking oils and fats, which fall under the category of Class K fires. Class K fire extinguishers are specifically formulated to handle these types of fires effectively. They contain agents that can cool the burning grease and create a barrier between the fire and the oxygen, helping to extinguish it safely.

Using other classes, such as Class A (for ordinary combustibles like wood and paper), Class B (for flammable liquids), or Class C (for electrical fires), is not appropriate for grease fires. These extinguishers do not have the necessary properties to address the unique nature of grease fires effectively, and using them could potentially worsen the situation by spreading the flames or failing to extinguish the fire altogether. Therefore, Class K is the correct choice to ensure safety and effectiveness when dealing with kitchen fires involving grease.