Periphery components for ESSER FACP
30 TI 798960.GB0 / 04.20
5.6 Arrangement of point-type fire detectors
Automatic fire detectors must be planned/installed so that the fire characteristics can reach the detectors without
obstruction.
The number and arrangement depend on:
• Room height
• Floor area
• Shape of ceiling and roof
• Maximum monitoring area per detector
At least one automatic fire detector must be installed in each room of the security area, excluding rooms with a
low fire load or with no possibility of fire spreading. If it is expected that lives could be endangered, sub-areas
where smoke could spread to are also deemed to be rooms.
Fig. 17: Arrangement of point-type fire detectors
In rooms with forced ventilation, perforated ceilings that are used for ventilation must be sealed in a 0.5 m radius
around the detector.
The number of fire detectors should be chosen so that the specified maximum monitoring areas are not
exceeded.
For arrangement in two-detector dependency, the maximum surveillance areas:
• for smoke/heat detectors must be reduced by at least 30 %.
• for the activation of fire protection equipment (e.g. fire extinguishing systems) must be reduced by 50% for
each detector.
In case of multisensor detectors (multi-criteria detectors), the maximum monitoring areas of detectors, which are
dependent upon the height and size of the room that is to be monitored, shall apply. Multisensor detectors are
not regarded as integrated 2-detector dependency, as there is no local separation of the different sensors.
If the room deviates from the ideal square distribution, the greatest distance (horizontal distance) between a
point-type automatic fire detector and any random point on the ceiling must be determined for smoke detectors
and heat detectors, taking account of the incline of the roof and the maximum monitored area.
An excellent overview of the IQ8Quad fire detectors, including possible applications is provided by the
app: "IQ8Quad - Which fire detector for which application?"
The app is available in Google Play and the App Store.
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