How can you tell the difference between a Class K and a Class B extinguisher?

The distinction between Class K and Class B fire extinguishers lies primarily in the types of fires they are designed to combat. Class K extinguishers are specifically formulated for fires involving cooking oils and fats, which are common in commercial kitchens that utilize appliances like deep fryers. These types of fires can be particularly dangerous due to the high flash points of cooking oils and the potential for rapid spread.

On the other hand, Class B extinguishers are designed to deal with fires that involve flammable liquids, such as gasoline, oil, solvents, and other similar materials. These fires can occur in various environments but are not limited to kitchens.

Understanding this differentiation is crucial for effective fire response. Using the appropriate extinguisher ensures that the fire is dealt with safely and effectively, minimizing the risk of exacerbating the situation. The specificity of Class K extinguishers to cooking situations is rooted in how cooking oils behave when ignited compared to other flammable substances, which is why they require different extinguishing agents and methods for optimal safety.