What Types of Fires Is a CO2 Fire Extinguisher Suitable For?

When it comes to selecting the right fire extinguisher, knowing what types of fires each type is designed to combat is essential. The CO2 fire extinguisher is a common and effective option, especially in environments where electrical or flammable liquid fires pose a risk.

In this detailed guide, we’ll explore what types of fires a CO2 extinguisher can handle, its advantages, common applications, and how to use it safely. We’ll also include trusted references and answers to frequently asked questions.

What Is a CO2 Fire Extinguisher?

A CO2 (carbon dioxide) fire extinguisher uses compressed carbon dioxide gas to displace oxygen, which smothers the fire. It also helps cool the surface of flammable materials without leaving residue. 

Unlike water or foam-based extinguishers, CO2 does not cause electrical damage or corrosion, making it ideal for sensitive equipment.

Types of Fires CO2 Extinguishers Are Suitable For

CO2 extinguishers are best suited for the following fire classes:

1. Class B Fires

Involving flammable liquids such as:

• Petrol
• Diesel
• Alcohol
• Kerosene
• Paint thinners

These fires spread quickly, and CO2 extinguishers suffocate the flames without spreading the liquid.

2. Class C Fires / Electrical Fires

Involving:

• Computers
• Servers
• Circuit breakers
• Power tools

Since CO2 is non-conductive and leaves no residue, it is ideal for electrical fires, unlike water or powder-based extinguishers.

Fires That CO2 Extinguishers Should Not Be Used For

It’s equally important to understand what fires CO2 is not suitable for:

• Class A Fires: Combustible solids like paper, cloth, or wood
• Class D Fires: Involving combustible metals
• Class K/F Fires: Kitchen fires involving oil or grease

Using a CO2 extinguisher on these fire types can be ineffective or even dangerous.

Advantages of CO2 Fire Extinguishers

• Leaves no residue – perfect for use around electronics
• Non-damaging – doesn’t harm electrical components
• Quick discharge – instantly reduces oxygen around the fire
• Clean agent – no messy cleanup required

These advantages make CO2 extinguishers a favorite in IT and office settings.

Where Are CO2 Fire Extinguishers Commonly Found?

Due to their unique properties, CO2 fire extinguishers are typically placed in:

• Server rooms and data centers
• Offices with extensive electronic setups
• Electrical panel rooms
• Computer labs in schools or colleges
• Light industrial workshops

They are also used in:

• Commercial kitchens (for electrical panels)
• Modern smart homes (home server cabinets)

Best Practices for Using a CO2 Fire Extinguisher

Use the PASS technique:

1. Pull the pin
2. Aim the horn at the base of the fire
3. Squeeze the handle
4. Sweep from side to side

Safety Note:

• Always hold the horn by its insulated handle
• CO2 gas is extremely cold and can cause frostbite if touched directly
• Use in well-ventilated areas to prevent CO2 buildup

Featured Product: Kanex 4.5 Kg CO2 Fire Extinguisher

Looking for a reliable CO2 extinguisher? The Kanex CO2 Fire Extinguisher is a solid choice.

Key Features:

• Effective for Class B and electrical fires
• Portable 4.5 Kg unit
• High-quality pressure cylinder
• Non-corrosive and maintenance-friendly

Ideal for offices, retail environments, workshops, and home IT areas.

Maintenance and Inspection Tips

• Inspect monthly for pressure and hose integrity
• Service annually by certified technicians
• Replace every 10 years if not used
• Ensure nozzle and label are visible and clean

Regular inspection ensures the extinguisher remains ready for emergencies.

Conclusion: 

Understanding what types of fires a CO2 extinguisher is suitable for is critical in building your fire safety plan. CO2 is the best option for flammable liquids and electrical fires, especially in areas with sensitive equipment.

Keep one in your office, workshop, or server room to ensure protection without causing secondary damage. The Kanex CO2 Fire Extinguisher offers high reliability and ease of use for both commercial and residential applications.

FAQs

1. What kind of fire is CO2 used for?
CO2 fire extinguishers are suitable for Class B fires (flammable liquids) and electrical fires (Class C).

2. Can CO2 extinguishers be used on electrical fires?
Yes. CO2 is non-conductive and safe for use on energized electrical equipment.

3. Where are CO2 fire extinguishers commonly found?
They are commonly found in server rooms, offices, data centers, electrical panels, and computer labs.

Secure your space against fire hazards.
Get the Kanex CO2 Fire Extinguisher from Fire Supplies and protect your electronics and high-risk zones with precision and power.