What does a Class A fire consist of?

Class A fires are defined as those that involve ordinary combustible materials such as wood, paper, cloth, and some plastics. These materials are typically found in everyday environments and are common in residential and commercial settings. When these materials ignite, they can produce embers and ash, which can spread the fire if not contained quickly.

In contrast, Class B fires involve flammable liquids such as gasoline, oil, and paint, while Class C fires pertain to electrical equipment. Class D fires involve flammable metals like magnesium or titanium, which require specific extinguishing agents. Understanding the distinctions between these classes helps firefighters and HVAC professionals choose the appropriate fire suppression methods and materials used in construction and safety protocols.