What class of fire extinguisher is represented by the red square symbol?

The fire extinguisher represented by the red square symbol is specifically designed for extinguishing Class A fires. Class A fires involve ordinary combustible materials such as wood, paper, and cloth. The red square symbol indicates that the extinguisher uses water or other suitable agents that can effectively cool and extinguish these types of fires.

Class B fires, on the other hand, entail flammable liquids, gases, and greases, which require different extinguishing agents such as foam or CO2. This distinction is critical because using the wrong type of extinguisher on a fire can exacerbate the situation, which may lead to dangerous consequences. Understanding fire classes and corresponding extinguishing methods is essential for effective fire safety and prevention.