Type of Fire Extinguishers
- WATER AND FOAM - Extinguish the fire by taking away the heat element of the fire triangle. Foam agents also separate the oxygen element. Water extinguishers are for Class A fires only. Foam extinguishers can be used on Class A & B only.
- CARBON DIOXIDE - Remove the oxygen and heat elements of the fire triangle. For use on Class B & C fires while usually ineffective on Class A fires.
- DRY CHEMICAL - Interrupt the chemical reaction of the fire triangle. Ordinary dry chemical is for Class B & C fires only. Some multipurpose agents also create a barrier between the oxygen element and the fuel element on Class A fires. It is important to use the correct extinguisher for the correct fuel.
- WET CHEMICAL - Removes the heat of the fire triangle and prevents re-ignition by creating a barrier between the oxygen and fuel elements. Developed for Class K fires. Some may also be used on Class A fires.
- CLEAN AGENT - A.K.A. Halogenated, extinguish the fire by interrupting the chemical reaction of the fire triangle with newer and less ozone depleting halocarbon agents. Primarily for Class B & C fires. Some may also be used on Class A fires.
- DRY POWDER - Separate the fuel from the oxygen element, or by removing the heat element of the fire triangle. Use for Class D fires only, as they are ineffective on all other classes of fires.
- WATER MIST - Remove the heat element of the fire. An alternative to Clean Agent extinguishers where contamination is a concern. Primarily used for Class A fires, though safe for use on Class C fires as well.