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R Areas affected by breezes from fans, air
conditioning unit compressors, water
heaters, or car exhaust (severe
temperature variations may cause false
detections)
R Areas subject to severe weather, such as
strong wind (camera shake can cause false
detections) or rain (strong rain may be
detected as an object moving in front of the
camera)
R Areas with reflective objects, such as glass,
that can interfere with detection of
temperature variation
R Areas where brightness changes easily
(such as areas where shadows form in the
afternoon and lights turn on at night)
R Areas where backlight occurs (faces
appear dark and are difficult to identify),
such as the following
– Areas where most of the background is
the sky
– Areas where direct sunlight reflects off a
white wall or background
– Bright areas such as those exposed to
direct sunlight
Installation Location
15
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