The vast majority of systems installed are Total Flood systems and all Kidde Gas Suppression Systems are approved for Total Flood applications. Kidde Carbon Dioxide Systems however, are approved for both Total Flood and Local Applications.
In a total flooding system, a predetermined amount of agent is discharged through fixed piping and nozzles into an enclosed space or enclosure around the hazard. Total flooding is applicable when the hazard is totally enclosed and when all openings surrounding the hazard can be closed automatically prior to or at the start of system discharge. The agent extinguishing concentration must be maintained for a sufficient period of time, generally a minimum of ten minutes.
Local application systems differ from total flooding in that the nozzles are arranged to discharge directly onto the fire. Local application is practical in those situations where the protected equipment can be isolated from other combustibles so that fire will not spread beyond the area protected, and where the entire hazard can be protected. One of the principal uses of local-application systems is to protect open tanks containing flammable liquids, but this technique can be generalized to protect three-dimensional hazards such as paint spray booths and printing presses. Suppression by local application is transitory, and will not be effective unless suppression occurs quickly and all potential re-ignition sources are eliminated.