There are a wide variety of hand portable and wheeled fire extinguishers, both "compliance" (code required) and "specialty" types. "Specialty" type extinguishers are intended for use on particular types of hazards, so careful attention should be made to locating them in close proximity to the specific hazard they are meant to protect. It is natural for a person to use the extinguisher located nearest to a fire. The most current issue of NFPA-10 should be consulted for minimum recommended fire extinguisher types, placement and travel distances. Pennyrile Fire Safety is professionally qualified and equipped to help you evaluate and implement these recommendations.