The ‘Fire Rating’ of an extinguisher is the measure of the size of fire it can tackle.
For instance, a 9lt Foam Extinguisher which we supply has a 21A, 183B fire rating. This means that it can be used to tackle a fire of up to 21kg of flammable solids, or 183lt of flammable liquids.
These ratings are set by independent laboratories, using a consistent testing procedure. The fire fighting is done by a professional fire fighter. It’s important to remember this, as when the extinguisher is in the hands of a professional it is capable of much greater performance than may be achieved by someone who only has minimal training.