9
sensitive or impairing smoke
entry.
•
In areas where the ambient
temperature is not controlled
and may regularly drift below
4°C (40°F) or above 38°C (100°F)
e.g. unheated buildings, open
attic spaces.
•
Very dirty, dusty or greasy areas.
•
In very draughty areas, such as
close to ceiling fans or fresh air
vents. Draughts can blow smoke
away from the alarm.
•
In insect infested areas. Insects
can clog openings to the sensing
chamber, preventing smoke
entry or causing unwanted
alarms.
•
Within 30cm (12”) of a fluorescent
light fitting which emits electrical
‘noise’ that can prevent correct
alarm operation.
•
Within 30cm (12”) of a wall, light
fittings or other ceiling based
obstructions.
•
In ‘dead air’ spaces (see following
diagram).