The Fire Triangle

The fire triangle or combustion triangle is a basic model for comprehending the needed parts for many fires.

The triangle exemplifies the three components a fire has to ignite: heat, fuel, and an oxidizing agent (typically oxygen).

A fire naturally takes place when the components are joined and present in the proper mix, as well as a fire can be avoided or extinguished by removing any one of many components in the fire triangle. For example, covering a fire having a fire blanket removes the “oxygen” part of the triangle and may extinguish a fire.

A fire needs three fundamental parts – air, fuel and heat. At least one among them must be taken out, to restrain the fire.

For a fire to distribute and prosper it needs three things:

— Fuel for the fire to burn
— Oxygen for the fire to respire
— Heat for the fire to continue burning.

The fire will be extinguished by removal of any one of the sides of this Fire Triangle.


If fuel is removed, the fire will starve and be extinguished. This is sometimes done via lots of preemptive systems, including prescribed burning or physical removal of the fuel.

During wildfire quelling the removal of fuel can be achieved physically through the raking of fire line or using bulldozers to clear a fire line.

The removal of fuel can be done via the ignition of little controlled fires to eliminate the fuel ahead of the fire. These fires, called burnout fires, are lit from control lines and can merely be performed by seasoned fire fighters and well-supervised crews.


If atmosphere is removed, the fire will suffocate – because of too little oxygen – and go out. The removal of air from a fire is rather difficult since many fires are typically rather large and encompass substantial region.

The removal of heat is the most common type of fire suppression.

You will find systems of suppression, however, that work to the idea of suffocating the fire.

Water-based foam sprayed to the fire will work as a blanket involving the atmosphere and also the fire. Likewise, a layer of soil shoveled onto the fire will work as a blanket.

The removal of air from a fire is a kind of assault that’s usually just restricted to little or readily reachable fires.


The removal of heat or the cooling of a fire is the most common type of quelling.

Generally water can be used to fundamentally soak up the heat produced by the fire. The water is turned by this heat into steam, thus robbing the fire of the heat used.

Without energy in a type of heat the fire cannot warm unburnt fuels to ignition temperature and also the fire will gradually go out. In addition, the water can act to suffocate the fire and smother the fires.

Substances can be added to water to enhance heat removal properties of water, or to enhance the power of the water to stick to unburnt fuel.