Fires are classified by fuel type. Using the wrong extinguisher can make a fire significantly worse. Know the class before you act.
Class A fires involve ordinary solid combustible materials that leave ash behind when they burn. These are the most common fires in offices, homes, and public buildings.
Class B fires involve flammable or combustible liquids. These fires spread rapidly and can re-ignite if the fuel vapour is not blanketed or cooled.
Class C fires involve flammable gases. The primary action is to isolate the gas supply — suppression alone is dangerous as unburnt gas can accumulate and explode.
Class D fires involve combustible metals that burn at extremely high temperatures. Standard extinguishers are ineffective and can make things worse — specialist dry powder is required.
Class E (electrical) fires involve energised electrical equipment. The primary hazard is electrocution — only non-conductive agents should be used, and the supply should be isolated if safe to do so.
Class K (US) / Class F (European/Indian) fires involve cooking oils and fats at high temperatures. These require a specialist wet chemical agent — standard extinguishers are inadequate and water is catastrophically dangerous.
Our engineers will assess your building's fire risk profile and specify the correct extinguisher types and quantities.
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