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5.2.3
Flat ceilings
The wireless smoke detector must be mounted on the
ceiling in the centre of a room.
Keep a minimum distance of 0.5m from the walls, the
corners of the room, or any joists or furnishings that
could obstruct the penetration of fire smoke into the
smoke detector.
Rooms that are divided by partial walls or furnishings
should be monitored with a smoke detector in each part
of the room if these partial walls or furnishings obstruct
the penetration of fire smoke into the smoke detector.
If rooms are separated into ceiling panels by joists (subdi-
visions) with a height greater than 20 cm and the area of
these panels is greater than 36 m², one smoke detector
must be installed per ceiling panel.
The smoke detector must be mounted as level as
possible on the ceiling; an inclination of max. 20°
is permissible. The slope on roofs in buildings with
common pitched roofs is greater; in other words,
mounting is not permitted there. Installation on
sloping ceilings is not permitted, contrary to the
installation method provided for in DIN 14676,
4.3.5.4.
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