| Type | How it works / Danger of use | | Carbon Dioxide (CO2) | Black | 
| | Best for: | Live electrical equipment when it is not possible to isolate the electric supply and flammable liquids such as grease, fats, oil paint, petrol etc. but not on domestic chip or fat pan fires. | | | | Danger: | Warning: The extinguisher sounds a loud noise when started. Do not use on domestic chip or fat pan fires. This type of extinguisher does not cool the fire very well and you need to watch that the fire does not start up again. Fumes from CO2 extinguishers can be harmful if used in confined spaces: ventilate the area as soon as the fire has been controlled. Do not hold the horn whilst in use as it becomes very cold. | | | | How to use: | The discharge horn should be directed at the base of the flames and the jet kept moving across the area of the fire. | | | | How it works: | Carbon dioxide extinguisher works on classes B and C and works by suffocating the fire. Carbon dioxide will not burn and displaces air. |
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