Choosing the right fire extinguisher can be a daunting prospect, unless you have the right information. When considering your choices, start with the knowledge that there are four basic types of extinguishers, each designed for a specific type of fire. Modern extinguishers are marked with symbol and color/letter combinations to designate the types of fires they are intended to extinguish; this allows you to find the one that meets your needs.
Water extinguishers – Class A Fires
Class A fires involve common combustible material, such as wood, paper, or textiles. Water extinguishers are effective for this type of fire. However, if a fire involves other materials, such as electronics, grease, or oil, you will need a different class of extinguisher. These extinguishers are marked with information on the amount of water they hold and the anticipated coverage it has when used.
Carbon dioxide (CO2) extinguishers – Class B and C Fires
These extinguishers are effective against class B and C fires, but have a few draw backs. Since they use gas, it is quick and clean but dispersion limits the effective range to between 3 and 8 feet. The gas is also cold, which can cause ice to form on the extinguisher. When using this type, it is important to continue use even after the flame is gone to prevent re-ignition, since it is effective only while being used.
Halon extinguishers – Class C Fires
These are special extinguishers that interrupt the chemical reaction of burning fuel. Since they do not leave chemical residue, they are often used on electrical equipment so the extinguishing process does not cause further damage atop the fire. Again, since this device uses gas, its range is limited to between 4 and 6 feet. The most effective use of this type of extinguisher is to target the base of the fire.
Dry chemical extinguishers – Multi-Purpose
These extinguishers are capable of combating all three primary classes of fire. These use an extinguishing agent (a powder or foam) that is propelled by non-flammable gas. They leave behind a residue that must be cleaned quickly (once the emergency has passed) as it is mildly corrosive, but it also prevents re-ignition. While highly effective, these should not be used in areas with valuable equipment or electronics that could be damaged by the residue.
When choosing an extinguisher, pay attention to its letter rating to make sure it will be capable of protecting you from any potential fire hazard in its intended environment. There are many extinguishers available with an A, B, and C rating that can combat most types of fires.
While working to create a fire safety plan, Gate Keepers Fire & Safety experts can help you choose the best extinguisher for each environment and will help you make sure they are ready if the worst happens. Contact us today for a free consultation on your specific needs.
The final article in this series is a wrap up, you can read it here.
For additional information contact a representative at Gate Keepers Fire & Safety at (303) 915-3670 or click here to send us a message.