The Fire Triangle is a simple model that explains the three essential elements needed for a fire to ignite and sustain:
- Fuel – Any combustible material (wood, paper, gasoline, fabric, etc.).
- Oxygen – Fire needs at least 16% oxygen to burn (air contains about 21%).
- Heat – A heat source (matches, sparks, electrical wiring, friction) is needed to ignite the fire.
Fire Triangle Formula:
Fuel + Oxygen + Heat = Fire
If any one of these elements is removed, the fire will be extinguished.
How to Break the Fire Triangle?
- Remove Fuel – Shut off gas supply, clear flammable materials.
- Remove Oxygen – Use CO₂ or foam extinguishers, smother flames with a fire blanket.
- Remove Heat – Apply water, fire retardants, or cooling agents to lower temperature.
Expanded Concept: The Fire Tetrahedron
Modern fire science adds a 4th element: Chemical Chain Reaction
This is called the Fire Tetrahedron and explains how some fires, like grease fires, need special extinguishing agents to stop the reaction.
