What does the term "fire tetrahedron" include?

The term "fire tetrahedron" is a model that describes the four essential elements needed for fire to occur. In this model, heat, fuel, oxygen, and a chemical reaction are identified as key components.

Heat is necessary to raise the material to its ignition temperature. Fuel refers to any combustible material that can burn. Oxygen is typically supplied by the air and is vital for sustaining combustion. Lastly, a chemical reaction is the process through which the combustion occurs, releasing energy in the form of heat and light. This combination explains how fires start and sustain themselves.

Understanding the fire tetrahedron is crucial for fire prevention and extinguishing strategies, as removing any one of these elements will suppress or extinguish a fire.