What is required for an auxiliary agent to be effective?

For an auxiliary agent to be effective, it must be rated for a specific class of fire. This ensures that the agent is capable of suppressing the type of fire encountered, as different classes of fires require different suppression methods and materials. For example, Class A fires (ordinary combustibles) are best controlled using water or foam, while Class B fires (flammable liquids) often require agents like dry chemical powders or foams specifically designed to handle flammable liquids. The effectiveness of an auxiliary agent significantly depends on its compatibility with the fire’s characteristics.

Using an agent that is not rated for the specific class of fire can lead to ineffective suppression, possible re-ignition, or even exacerbation of the fire, which is why proper classification and rating are essential for ensuring safety and effectiveness in firefighting efforts.