wheeled dry powder fire extinguishers are effective on all types of fire - Class A, B, C. Our dry powder agents - monoammonium phosphate and ammonium sulphate base - are non-conductors of electricity. When discharged, the heat from the fire is greatly reduced. Firstly, because a cloud of powder provides an effective heat-shield. Secondly, because there is an immediate knockdown of the flames. Hence, the flames are suffocated and any embers are extinguished by a layer of melted powder.