How to Properly Use a Fire Extinguisher

A fire extinguisher is one of the most important pieces of safety equipment in your home, and it’s required by law in many states. But before you buy one, it’s a good idea to familiarize yourself with the different types of fires and the proper use of a fire extinguisher. A fire extinguisher can save lives, and you can reduce the amount of damage to your home by using it correctly.

Before you use a fire extinguisher, always read the instructions. A good place to start is at your local fire department or with a fire equipment distributor, as they often offer hands-on fire extinguisher trainings. Also, it is a good idea to install your fire extinguisher near an exit so you can leave the area quickly if the fire gets out of control. It’s also important to install and practice your fire escape plan, so you know how to exit quickly in case the fire doesn’t get put out or the smoke becomes too thick.

Water-based fire extinguishers have a cool, absorbing effect on the flames by soaking burning materials with water, which helps to extinguish them. They’re commonly used in offices, shops, schools, hotels and commercial premises. They usually have jet or spray nozzles, and they are not effective for Class B fires (flammable liquids) or Class C fires (electrical equipment).

Dry chemical fire extinguishers contain a mixture of sodium bicarbonate and sulphuric acid that react when you press the handle. This forms carbon dioxide “snow,” which cuts off the oxygen supply to the flames, which stops them from burning. This type of fire extinguisher is effective on Class A, Class B and some Class C fires. This type of fire extinguisher can damage or ruin electrical equipment, so it’s important to carefully follow the directions and sweep the nozzle across the fire surface to disperse the agent over a large area.

Carbon dioxide fire extinguishers are very effective on Class B and Class C fires because they remove the oxygen supply and cool the fire to the point of suffocation. They also don’t leave any residue and are especially practical in office areas, as they won’t damage expensive electrical equipment.

Aqueous film-forming foam (AFFF) fire extinguishers are used on Class B and Class C fires, but they’re also useful for Class F oil fires. These fires occur when cooking fats, oils or grease ignite. The AFFF sprays a dense foam on the fire, which prevents it from spreading. It’s not effective for burning metal, but it does help to prevent re-ignition by cooling the burnt material.

Remember that the rating on a fire extinguisher refers to the size of average fire area it can be expected to put out. If you are not comfortable operating a certain fire extinguisher, or if the rated area is too small, it’s better to evacuate the room and call 911 instead of risking your life. Regardless of the fire extinguisher’s rating, the most important thing is to have a fire evacuation plan and work together with your family to practice it in case of a fire.