Which fire extinguisher type is recommended for Class B fires?

Halogenated agents are recommended for Class B fires, which involve flammable liquids such as gasoline, oil, and grease. These extinguishers are effective because they work by interrupting the chemical reaction occurring in the fire. Halogenated agents are non-conductive and leave no residue, making them suitable for use in areas where electronic equipment is present, such as server rooms or laboratories.

On the other hand, water type extinguishers are not recommended for Class B fires since water can spread the flammable liquid, potentially making the fire worse. Wet chemical extinguishers are specifically designed for Class K fires (cooking oils and fats) rather than Class B. Foam type extinguishers can be effective against Class B fires but are not as specialized as halogenated agents for this purpose. Thus, the halogenated agent is the best choice for combating Class B fires, effectively addressing the unique challenges these types of fires present.