‪Fire Extinguisher Explosion While Training A fire extinguisher is a device used to control or extinguish a fire. While they are often credited with saving lives and protecting property, there are also several dangers associated with fire extinguishers. These dangers should be carefully considered when developing training strategies or using an extinguisher to fight a fire. There are five different types of fire extinguishers used Class A models are used on paper, lumber and most home fires. Typ