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Facts about co2 fire extinguishers

•    A fire requires 3 elements to burn; heat, fuel and oxygen. Co2 extinguishers work by removing the oxygen from a fire which impedes the combustion triangle.
•    They are capable of extinguishing flammable liquid fires such as butane, propane, solvents and petrol, and also electrical fires. 
•    Co2 extinguishers are the most popular choice for covering the risk of electrical fires.
•    As they do not leave any residue after being discharged, they are the most often recommended extinguisher for office environments.
•    If you ever have to tackle an electrical fire with a co2 extinguisher, only do so if it is safe, stand between the fire and a safe exit and remember to turn off electrical equipment first.
•    The co2 or ‘carbon dioxide’ is stored as a liquid within the extinguisher. 
•    As the co2 is extremely cold when leaving the heavily pressurised extinguisher cylinder, there is a risk of freeze burn if the user touches the nozzle.  More up to date models have a ‘frost free’ safety horn to prevent this. 
•    It can be very dangerous to use a co2 on a cooking fat fire.  Their powerful discharge may cause the fire to spread or even cause an explosion.
•    The most commonly available sizes for co2 extinguishers are 2kg and 5 kg, although larger and smaller models are available which range from 1kg to up to 30kg. 
•    Although mainly red, carbon dioxide extinguishers have a black colour code panel to enable quick identification in case of an emergency.