This part of ISO 11602 gives requirements for the selection and installation of portable and wheeled fire extinguishers. It should be used in conjunction with ISO 11602-2.Fire extinguishers are intended as a first line of defence against fires of limited size. They are needed even if the property is equipped with automatic sprinklers, standpipe and hose, or other fixed protection equipment.This part of ISO 11602 is not applicable to permanently installed systems for fire extinguishment, even though portions of such systems may be portable (such as hose and nozzles attached to a fixed supply of extinguishing media).The requirements in this part of ISO 11602 are minimum requirements. The use of larger, higher rated or greater numbers of extinguishers will, in general, improve protection.Extinguishers for use on board aircraft, watercraft and vehicles are considered to be outside the scope of this part of ISO 11602.