A guide to the different fire extinguishers

Just as there are various classes of fire, there are types of different fire extinguishers. Here, we discuss the similarities and differences between the fire extinguisher types, as well as the class of fire they’re best suited to.

Types of different fire extinguishers

CO2 fire extinguishers

A CO2 fire extinguisher contains pure carbon dioxide and works to suffocate the fire by transferring the oxygen it needs to burn. This type of fire extinguisher is suitable for Class B fires (flammable liquids like petrol or oil) but it’s also recommended for electrical fires as it is non-damaging to electrical equipment and machinery. Premises that would benefit from incorporating a CO2 fire extinguisher, include modern offices, kitchens and server rooms.

Foam fire extinguishers

Most commonly used on Class B fires (flammable liquids), a foam fire extinguisher is also a recommended choice for Class A risk areas (those featuring combustible materials). These fire extinguishers perform a cooling function and quickly smother burning materials, while the foam agent helps prevent the fire reigniting. Foam fire extinguishers shouldn’t be used on kitchen fires or those with an electrical source. However, they’re ideal for office environments, hospitals, schools and other spaces where organic materials play a large role in the landscape.

MultiCHEM fire extinguishers

For an innovative fire-fighting solution, choose the latest in high-performance multi-class fire extinguishers. The MultiCHEM ABF-rated fire extinguisher is ideal for flammable liquid fires involving large quantities of fuel and a big surface area, but it’s also suitable for deep fat fryer fires too. The extinguisher’s 34A rating – the industry’s highest for a six-litre extinguisher – means that it’s capable of tackling a sizeable fire. Of all the different fire extinguishers, this is one of the most versatile types.

Powder fire extinguishers

A dry powder fire extinguisher is extremely versatile, suitable for use on Class A (combustible materials), Class B (flammable liquids) and Class C (flammable gases) fires. It’s for this reason they’re known as ‘ABC’ fire extinguishers. This type of fire extinguisher smothers fires by producing a thick barrier between the fuel and the source of oxygen. A powder fire extinguisher shouldn’t be used in confined spaces because the powder can easily be inhaled and it leaves a residue that can be difficult to clean up. Consider this fire extinguisher for premises including garage forecourts, commercial boiler rooms and workspaces that feature welding.

Water fire extinguishers

A water-based fire extinguisher is a popular choice for Class A fires (combustible materials). Water fire extinguishers work by cooling the fuel and ensuring it burns at a much slower pace until the fire is extinguished. Most premises are required to have a water or foam fire extinguisher, so they’re often found in busy places like offices, schools and hospitals. With a low-cost price, ease of maintenance and the fact they’re an environmentally friendly option, it’s easy to see why water fire extinguishers are a preferred choice for many businesses.

Water mist fire extinguishers

A water mist fire extinguisher is another versatile fire-fighting solution that’s suitable for use on Class A (combustible materials) and Class F (cooking oils and fats) fires, making it an ideal option for a number of different settings, including commercial kitchens, schools and factories. An environmentally friendly choice, the water mist fire extinguisher provides intense cooling to the fire with a mist curtain, cutting off the supply of oxygen and suffocating the flames. And since its contents aren’t harmful to the building or property, it’s also suitable for historical sites like museums and churches.

Wet chemical fire extinguishers

A wet chemical fire extinguisher is specifically designed for use on Class F fires (cooking oils and fats), making it the ideal solution for the demands of commercial kitchen and canteen environments. This type of fire extinguisher works by creating a layer of foam on the burning oil or fat, stopping the supply of oxygen so the fire isn’t fuelled any further.

For a quick-reference resource on different fire extinguishers, download our free CheckFire Extinguisher Guide – a simple visual that illustrates the types of different fire extinguishers and which is best suited to each class of fire.