Cooking oil fires are among the most dangerous types of kitchen fires because burning oil reaches extremely high temperatures and can quickly spread when handled incorrectly. Whether involving olive oil, vegetable oil, or deep fat fryer fires, these incidents fall under a specific category that requires specialised fire safety equipment. Using the wrong fire extinguisher can worsen the situation, turning a manageable fire into a dangerous fire that spreads rapidly due to the interaction between heat, oxygen, and flammable liquids. This blog explains what fire extinguisher for cooking oil is the safest to use, how wet chemical extinguishers work, and how to respond effectively to protect lives and property in both domestic and commercial premises.
The Right Fire Extinguisher for Cooking Oil Fires
Cooking oil fires belong to class F fires, which involve burning fats and cooking oils and fats commonly found in kitchens, particularly in deep fat or deep fat fryer environments. The correct fire extinguisher for this type of fire is a wet chemical fire extinguisher, often identified by its yellow coloured label. These class F fire extinguishers are specifically designed to combat fires involving hot oil and burning fats safely and effectively.
Wet chemical extinguishers work by releasing an extinguishing agent made from potassium salts, which reacts with the burning oil to form a soapy layer over the surface. This process cuts off oxygen, cools the flames, and prevents re-ignition. The cooling effect is crucial because cooking oil fires retain heat for a long time, making them prone to flare-ups if not properly controlled.
Unlike standard extinguishers such as foam fire extinguishers, dry powder extinguishers, or water based extinguishers, only extinguishers classified under wet chemical class are suitable for class F fires. Other fire extinguisher types may be effective for class A, class B fires, or even electrical fires and flammable gases, but they are not safe for cooking oil fires class situations. Choosing the correct fire extinguisher is essential for proper fire safety and compliance with legal requirements in both home and professional kitchen settings.
What to Do If a Cooking Oil Fire Starts
Knowing the correct response steps can significantly reduce fire risks and prevent escalation into large fires.
Turn Off the Heat Source if It Is Safe to Do So
Immediately turning off the heat source removes the energy feeding the fire, reducing the intensity of the flames and helping to control the situation.
Use a Wet Chemical or Class F Fire Extinguisher Aimed at the Base of the Flames
Use a wet chemical fire extinguisher by removing the safety pin and directing the spray at the base of the flames, ensuring the entire contents are applied to create a protective layer over the burning oil.
Keep a Safe Distance and Avoid Spreading the Fire
Maintain a safe distance of at least one metre to avoid burns and prevent splashing hot oil, which can quickly spread the fire to nearby combustible materials.
Monitor the Fire and Stop if It Is Not Controlled Quickly
If the fire is not controlled within seconds, stop attempting to combat the fire and reassess the situation to avoid putting yourself at further risk.
Evacuate and Call Emergency Services if the Fire Grows
If flames continue to spread or the fire becomes uncontrollable, evacuate immediately and contact emergency services to handle the dangerous fire safely.
What You Should Never Use on a Cooking Oil Fire
Certain actions can dramatically worsen kitchen fires and should always be avoided.
Pouring Water onto Hot or Burning Oil
Water reacts violently with burning oil, causing it to splatter and spread flames rapidly, increasing the risk of serious injury and fire damage.
Using the Wrong Type of Fire Extinguisher
Using dry powder extinguishers, foam fire extinguishers, or other standard extinguishers not designed for class f fires can fail to control the fire and may even spread burning oil further.
Attempting to Smother Flames with Clothes, Towels, or Fabric Materials
Fabric materials can ignite easily and add more fuel to the fire, turning a small incident into a dangerous and uncontrollable blaze.
Fire Safety Tips for Home Kitchens
Preventing kitchen fires is just as important as knowing how to respond when they occur.
Keep a Wet Chemical or Class F Fire Extinguisher Within Easy Reach
Having a class F fire extinguisher readily available ensures you can act quickly when dealing with cooking oil fires or deep fat fryer incidents.
Learn How to Use a Fire Extinguisher Before an Emergency
Understanding how different extinguisher types work, including how to remove the safety pin and aim correctly, is essential for effective fire safety.
Avoid Overheating Oil While Cooking
Cooking oil should never be left to reach excessively high temperatures, as this increases the likelihood of ignition and creates serious fire risks.
Never Leave Cooking Unattended
Unattended cooking is one of the leading causes of kitchen fires, particularly in commercial kitchen environments where multiple tasks are happening simultaneously.
Consider Installing Water-Based Fire Suppression Systems for Added Protection
A fire suppression system that uses fine mist technology can provide additional protection by cooling flames and reducing oxygen levels, especially in confined spaces or high-risk areas like professional kitchen settings.
Modern fire safety goes beyond having the correct fire extinguisher, as advanced systems now offer enhanced protection against cooking oil fires and other hazards in commercial premises. Installing a commercial water mist system can significantly reduce fire risks by using fine mist to cool flames and displace oxygen without spreading burning oil or damaging equipment. These systems are particularly effective in professional kitchen environments where high temperatures, flammable solids, and flammable liquids are present.
In addition to installing the right fire safety equipment, conducting a thorough fire risk assessment and ensuring proper staff training are critical for meeting legal obligations and maintaining a safe workplace. Understanding how different fire extinguishers class categories apply, from class A and class B to class C fires and class f fires, helps ensure that the correct fire extinguisher is always used for each scenario.
For those looking to deepen their knowledge of handling oil fires safely, the guide on how to put out a grease fire provides practical, step-by-step advice. Combining education, proper equipment, and modern fire suppression system solutions creates a safer environment where kitchen fires can be prevented or controlled effectively before they escalate into large fires.