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If the horizontal ceiling is less than 1 m wide, then the smoke alarm detector must be installed in
rooms with sloping ceilings as shown in Figure 2. If the ceiling is greater than 1m, then the smoke
alarm detector is placed on the horizontal ceiling
Figure 2: Mounting the smoke alarm detector on the ceiling ≤ 1m
Note: If you are unsure about the mounting of the smoke alarm detector in your rooms, please
advised by a qualified electrician!
The smoke alarm detector must be installed on the ceiling in the middle of the room, because
smoke rises to the ceiling of the room and spread horizontally. The smoke alarm detector should
be placed possible so that this is at least 50cm from the side wall and 61cm mounted away from
the corner of the room (see Figure 3).
Figure 3: Mounting the smoke alarm detector on the ceiling
On ceiling beams, which are thicker than 20 cm, no installation of smoke alarm detector
should be done. A minimum distance of 50 cm is urgently recommended.
The smoke alarm detector should be mounted at least 50 cm away from lamps and
fluorescent lamps.
An installation height of 6m maximum should not be exceeded. If the installation height is
more than 6m, the smoke alarm detector must be installed on several levels.
The smoke alarm detector can supervise a maximum area of 60m².
The maximum distance of smoke alarm detectors in extensive corridors can be up to 15 m. To
the end side of corridors the smoke alarm detectors should be applied in the distance of
maximum 7. 5 m.
In small corridors and rooms which are not wider than 1m, the smoke alarm detector must be
mounted in the middle of the ceiling.
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