Fire extinguishers are essential safety devices designed to help control or extinguish small fires. 

However, not all fires are the same, which is why there are different types of fire extinguishers available. 

There are 5 fire extinguisher types for different types of fires. 

In this article, we’ll explore the five main types of fire extinguishers and explain when each should be used.

Why Are There Different Types of Fire Extinguishers? 

Different types of fires require different approaches to extinguish them safely and effectively.

Type of Fire

Fires are classified into different classes of fires based on the type of fuel involved. 

Class A fires involve solid materials like wood and paper, Class B fires involve flammable liquids, Class C fires involve electrical equipment, Class D fires involve flammable metals, and Class F fires involve cooking oils and fats.

Different Methods of Extinguishing Fires

Each type of fire extinguisher is designed to combat a specific type of fire using different methods. 

For example, water extinguishers cool the fire, foam extinguishers create a barrier between the fuel and the oxygen, and CO2 extinguishers displace oxygen, smothering the fire.

Safety and Effectiveness

Using the wrong type of fire extinguisher can actually make a fire worse or put you at risk. 

Therefore, it’s crucial to understand the different types of fire extinguishers and when to use them.

5 Fire Extinguisher Types Explained

Water

How Does a Water Fire Extinguisher Work?

Water fire extinguishers are the most common type and are used to extinguish Class A fires, which involve solid materials like wood, paper, and textiles.

They work by cooling the fire, reducing the temperature below its ignition point. 

When water is applied to the fire, it absorbs heat from the fire, lowering the temperature and extinguishing the flames.

When to Use a Water Fire Extinguisher

Water fire extinguishers are suitable for fires involving solid materials such as wood, paper, and textiles.

They are effective for extinguishing fires in offices, schools, warehouses, and other environments where Class A fires are most likely to occur.

When Not to Use a Water Fire Extinguisher

Water fire extinguishers should not be used on fires involving flammable liquids, electrical equipment, or cooking oils and fats.

Using a water extinguisher on these types of fires can actually make the fire worse and increase the risk of electric shock or spreading the fire.

Where Are Water Fire Extinguishers Normally Found?

Water fire extinguishers are commonly found in offices, schools, warehouses, and other commercial and industrial environments.

They are usually mounted on walls in easily accessible locations and are identified by their red label colour..

CO2

How Does a CO2 Fire Extinguisher Work?

CO2 (Carbon Dioxide) fire extinguishers are used for Class B and Class C fires, which involve flammable liquids and electrical fires.

They work by displacing oxygen, smothering the fire and preventing it from spreading.

When CO2 is discharged from the extinguisher, it turns into a gas, depriving the fire of the oxygen it needs to continue burning.

When to Use a CO2 Fire Extinguisher

CO2 fire extinguishers are suitable for fires involving flammable liquids such as petrol, oil, and paint, as well as electrical fires.

They are commonly used in areas where there is a risk of electrical fires, such as offices, server rooms, and workshops.

When Not to Use a CO2 Fire Extinguisher

CO2 fire extinguishers should not be used on fires involving Class A materials such as wood, paper, and textiles.

They are also not effective for fires involving cooking oils and fats.

Additionally, CO2 extinguishers should not be used in confined spaces, as the gas can displace oxygen and cause suffocation.

Where Are CO2 Fire Extinguishers Normally Found?

CO2 fire extinguishers are commonly found in offices, server rooms, workshops, and other environments where there is a risk of electrical fires.

They are usually mounted on walls in easily accessible locations and are identified by their black label colour..

Foam

How Does a Foam Fire Extinguisher Work?

Foam fire extinguishers are versatile and can be used for Class A and Class B fires.

They work by creating a blanket of foam that seals the fire’s surface, preventing re-ignition.

The foam also cools the fire, reducing the temperature and smothering the flames.

When to Use a Foam Fire Extinguisher

Foam fire extinguishers are suitable for fires involving solid materials such as wood, paper, and textiles (Class A fires), as well as flammable liquids such as petrol, oil, and paint (Class B fires).

They are commonly used in offices, workshops, garages, and other environments where there is a risk of both Class A and Class B fires.

When Not to Use a Foam Fire Extinguisher

Foam fire extinguishers should not be used on fires involving electrical equipment (Class C fires) or cooking oils and fats (Class F fires).

Using a foam extinguisher on these types of fires can actually make the fire worse and increase the risk of electric shock or spreading the fire.

Where Are Foam Fire Extinguishers Normally Found?

Foam fire extinguishers are commonly found in offices, workshops, garages, and other commercial and industrial environments.

They are usually mounted on walls in easily accessible locations and are identified by their cream label colour..

Dry Powder

How Does a Dry Powder Fire Extinguisher Work?

Dry powder fire extinguishers are suitable for Class A, B, and C fires, as well as fires involving flammable gases and metals.

They work by forming a barrier between the fuel and the oxygen, smothering the fire and interrupting the chemical reaction.

Dry powder extinguishers contain a fine powder composed of sodium bicarbonate or potassium bicarbonate, which chemically inhibits the combustion process.

When to Use a Dry Powder Fire Extinguisher

Dry powder fire extinguishers are versatile and can be used for a wide range of fires, including fires involving solid materials (Class A), flammable liquids (Class B), and electrical equipment (Class C).

They are also effective for fires involving flammable gases such as propane and butane, as well as fires involving flammable metals such as magnesium and titanium.

When Not to Use a Dry Powder Fire Extinguisher

Dry powder fire extinguishers should not be used on fires involving cooking oils and fats, such as grease fires (Class F fires).

Using a dry powder extinguisher on these types of fires can actually make the fire worse and increase the risk of spreading the fire.

Where Are Dry Powder Fire Extinguishers Normally Found?

Dry powder fire extinguishers are commonly found in industrial environments, laboratories, workshops, and garages.

They are usually mounted on walls in easily accessible locations and are identified by their blue label colour.

Wet Chemical 

How Does a Wet Chemical Fire Extinguisher Work?

Wet chemical fire extinguishers are designed for Class F fires, which involve cooking oils and fats.

They work by cooling the fire and creating a barrier between the fuel and the oxygen.

Wet chemical extinguishers contain a special solution that reacts with the cooking oil or fat, forming a thick, soapy layer on the surface of the fire. 

This layer cools the fire and prevents it from re-igniting.

When to Use a Wet Chemical Fire Extinguisher

Wet chemical fire extinguishers are specifically designed for fires involving cooking oils and fats, such as deep fat fryers and commercial kitchens.

They are highly effective for extinguishing these types of fires and preventing them from spreading.

When Not to Use a Wet Chemical Fire Extinguisher

Wet chemical fire extinguishers should not be used on fires involving solid materials (Class A fires), flammable liquids (Class B fires), electrical equipment (Class C fires), or flammable metals (Class D fires).

Where Are Wet Chemical Fire Extinguishers Normally Found?

Wet chemical fire extinguishers are commonly found in commercial kitchens, restaurants, cafes, and other environments where there is a risk of fires involving cooking oils and fats.

They are usually mounted on walls in easily accessible locations and are identified by their yellow label colour.

Conclusion

That was a detailed breakdown of the 5 fire extinguisher types.

Each type of fire extinguisher is designed for specific types of fires, so it’s important to choose the right one for your needs.

By understanding the different types of fire extinguishers and their uses, you can be better prepared to respond effectively in the event of a fire emergency.

Remember to regularly inspect and maintain your fire extinguishers to ensure they are in good working condition and ready for use in case of an emergency.

In addition to having the right fire extinguishers, it’s also important to have a well-thought-out fire safety plan in place and to regularly train employees on fire safety procedures.

By taking these steps, you can help protect yourself, your employees, and your property from the devastating effects of fire.