Internal space protection, PIR Passive Infra Red detection is by far the most cost effective and
common form of protection found today. To prevent false alarms there are a number of rules to follow when installing detectors.

Installation hints
PIR detectors may be wall or corner mounted by applying different knockouts.

Do not install where the detector is in or facing direct / reflected sunlight, windows onto main roads (car headlights) or strong draughts / heaters).	Locate the detector at least one metre away from any illumination, to avoid possible interference.	PIR detectors are more sensitive to motion passing across the detection zones than toward the unit
Ensure that there are not any obstructions (plants, screens, furniture etc.) in the field of view which may cause incorrect cover / operation of the detector.	Avoid locating the detector in areas which contain equipment that may change the environment temperature rapidly. For example: above radiators.	Install the detector at the recommended height on a rigid, even surface.