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2.3 Positioning
Installation on the ceiling
Hot smoke rises and spreads across the ceiling of a room. Because of this, it is
recommended that you choose a central position on the ceiling for installing smoke
alarms. The air “stands still” in corners and does not circulate, therefore smoke alarms
should never be installed in corners. Place the alarm at least 0.5 m away from walls and
corners. Place the alarm at least 0.5 m away from lights or other decorative objects that
could obstruct the smoke's penetration into the smoke alarm. In rooms and hallways less
than 1 m wide, the smoke alarm should be installed in the centre of the ceiling between
the walls (see Figure 3).
Fig. 3
> 0.5 m
> 0.5 m
Installation in
the centre of
the ceiling
Fig. 4
< 6 m
Maximum room
height 6 m
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