Stand 6 to 8 feet away from the fire and follow the four-step PASS procedure recommended by National Fire Protection Association:
P - Pull the pin and hold the extinguisher with the nozzle pointing away from you.
A - Aim low at the base of the fire.
S - Squeeze the lever slowly and evenly to discharge the extinguishing agent. (When the agent first hits the fire, the fire may briefly flare up. This should be expected.)
S - Sweep the nozzle from side to side, moving carefully toward the fire. Keep the extinguisher aimed at the base of the fire.
Fire extinguishers are only one element of a complete fire survival plan.
Only use your extinguisher after making sure:
All residents of the home have been evacuated to safety
The fire department has been notified
There is a clear exit behind the person using the extinguisher
Use your extinguisher only to keep a small self-contained fire from growing, only when the room is not filled with smoke, or to create a safe pathway out of the home. Read the instructions and become familiar with your fire extinguisher's parts and operation before a fire breaks out.