(c) On a sloping Ceiling
In areas with sloping or peaked ceilings install your Smoke
Alarm 900mm (3ft) from the highest point measured
horizontally (see figure 5), because “dead air” at the apex may
prevent smoke from reaching the unit.
(d) Locations to Avoid
Don’t place your Smoke Alarm in any of the following areas:
• Bathrooms, kitchens, shower rooms, garages or other
rooms where the smoke alarm may be triggered by steam,
condensation, normal smoke or fumes. Keep at least 6 metre
(20 ft) away from sources of nuisance alarms - wall mounting
if necessary.
• Attics or other places where extremes of temperature may
occur (below 4°C/34°F or above 40°C/104°F).
• Near a decorative object, door, light fitting, window
molding etc., that may prevent smoke from entering the
Smoke Alarm.
• Surfaces that are normally warmer or colder than the rest of
the room (for example attic hatches, uninsulated exterior walls
etc). Temperature differences might stop smoke from reaching
the unit.
• Next to or directly above heaters or air conditioning vents,
windows, wall vents etc. that can change the direction of
airflow.
• In very high or awkward areas where it may be difficult to
reach the alarm (for testing, etc).
• Locate unit at least 1.5m (5 feet) and route wiring at least 1m
(3 feet) away from fluorescent light fittings as electrical
“noise” and/or flickering may affect the unit.
• Locate the unit at least 1 metre (3ft) from dimmer controlled
lights and wiring - some dimmers can cause interference.
• Locate away from very dusty or dirty areas as dust build-up
in the chamber can make unit too sensitive and prone to
alarm. It can also block the insect screen mesh and prevent
smoke from entering the chamber.
• Do not locate in insect infested areas. Small insects getting
in to the chamber can cause intermittent alarms.
(e) Nuisance/False Alarms
If, when the alarm goes off, there is no sign of smoke heat or
noise to indicate that there is a fire, you should get your family
into a safe place, before you start investigating.
Check the house carefully in case there is a small fire
smouldering somewhere.
Check whether there is some source of smoke or fumes, for
example cooking fumes being drawn past the Smoke Alarm by
an extractor.
If there are frequent nuisance/false alarms it may be necessary
to re- locate the device away from the source of the fumes.
5
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