ABSTRACT
When fire breaks out, it is essential that it is detected as soon as possible. The exponential rate of fire growth has already been stressed in the first chapter, and it is obvious that the earlier action can be taken to mitigate the consequences of ignition, the greater the possibility of success. Once a fire is detected, either by the occupants or by automatic means, it is then necessary to communicate the location of the fire to the occupants and the fire service. The information will enable any prearranged fire evacuation strategy to be instigated and trigger any automated response; such as an active smoke control system, closing fire doors or triggering a suppression system.
