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Understanding Class K Fire Extinguishers: Safeguarding Against Commercial Kitchen Fires

Commercial Kitchen fires can be a serious and potentially life-threatening hazard. With the increasing popularity of open-concept kitchen designs and the use of high-efficiency cooking appliances, the risk of fires caused by flammable cooking oils and fats has also risen. This is where Class K fire extinguishers play a vital role in keeping kitchens safe. In this blog post, we will explore the characteristics of Class K fire extinguishers, their importance in fire safety, and how they effectively combat kitchen fires.

The Basics of Class K Fires

Class K fires involve cooking oils, fats, and greases that are commonly found in commercial and residential kitchens. These types of fires pose unique challenges due to the high temperatures and fast spread of the burning substances. Traditional fire extinguishers, such as those designed for Class A or B fires, may not effectively extinguish Class K fires, making it crucial to have specialized equipment like Class K fire extinguishers readily available.

Understanding Class K Fire Extinguishers

Class K fire extinguishers are specifically designed to tackle kitchen fires involving cooking oils and fats. These extinguishers use a special extinguishing agent, typically a potassium acetate-based solution or wet chemical, that reacts with the burning oils and fats to suppress the fire. The extinguishing agent cools the temperature rapidly, forms a soapy foam layer to prevent re-ignition, and creates a chemical reaction to saponify the burning materials, rendering them non-combustible.

Features and Components

Class K fire extinguishers usually have distinctive features that make them suitable for kitchen environments. They often come in stainless steel containers to withstand the corrosive nature of cooking oils and fats. The extinguishing agent is dispensed through a special nozzle or applicator designed to provide a gentle spray or mist, minimizing the risk of splashing hot oil and aggravating the fire. These extinguishers are also equipped with a pressure gauge or indicator to ensure their readiness for use.

Proper Placement and Maintenance

To maximize the effectiveness of Class K fire extinguishers, proper placement and regular maintenance are essential. The extinguishers should be located in easily accessible areas, typically near the cooking area and exit routes. Adequate signage and clear instructions should accompany the extinguishers to facilitate their use during emergencies. Regular inspections, maintenance checks, and refills, as per the manufacturer's guidelines, are crucial to ensure the extinguishers are in optimal working condition.


Class K fire extinguishers are invaluable tools when it comes to safeguarding against kitchen fires caused by cooking oils, fats, and greases. By understanding their unique features, proper placement, and maintenance requirements, as well as providing adequate training to kitchen staff, the risk of severe damage and injuries can be significantly reduced. Ensuring the availability and proper use of Class K fire extinguishers is a proactive step towards creating a safer environment in both residential and commercial kitchens. Remember, fire safety is a shared responsibility, and knowledge is the key to prevention. City of Angels Fire has Class K fire extinguishers. Call us today to schedule your complimentary consultation at

(213) 725-3125

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