The fire triangle consists of three essential components—
fuel, heat, and oxygen—that must be present simultaneously for a fire to start and continue. Removing any single element will extinguish the fire. The model illustrates that fires can be prevented or controlled by removing or separating these ingredients.
Fuel: Combustible material in solid, liquid, or gas form (e.g., wood, paper, gasoline, curtains)
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Heat: Energy required to raise the fuel to its ignition temperature, causing combustion (e.g., sparks, friction, open flames, hot surfaces).
Oxygen: A surrounding oxidizerd
Removing Fuel: Removing the combustible material (e.g., stopping a fuel line).
Removing Heat: Cooling the fire, usually with water or specialized foam, to reduce its temperature below the ignition point.
Removing Oxygen: Starving the fire, often by smothering it with a fire blanket, foam, or displacing it with carbon dioxide
Note: While the fire triangle represents the basic ingredients, the "Fire Triangle vs Fire Tetrahedron | Human Focus" adds a fourth component—the chemical chain reaction—which is often referred to as the fire tetrahedron, covering how a fire spreads.