definition of fire extinguisher classes
(Redirected from Fire classes) Fire class is a term used to denote the type of fire, in relation to the combustion materials which have (or could be) ignited. This has onward impacts on the type of suppression or extinguishing materials which can be used. Class letters are often assigned to the different types of fire, but these differ between territories. There are separate US, European, and Australian standards. 1 Fire classes by country.