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Placement on the ceiling or wall
Installing on the ceiling is recommended. Mark
where the screws will go using the base as a
guide. If you're installing on the wall, make sure
it's within 12 inches of the ceiling.
CEILING
BEST
ON CEILING
OKAY
ON WALL
Figure 1
Placement on a sloped ceiling
If the slope of your ceiling is more than 19 degrees,
there's a triangle of dead air below the peak that
should be avoided. To check where the dead air
ends, think of the peak of your ceiling as the top
point of the triangle. The side of the triangle is
your wall. The base of the triangle connects the
wall to the slope of your ceiling. When the base
is 90 cm (35.4 in) long, you get the outline of the
dead air. Your smoke alarm should be installed
4
on the ceiling or wall not more than 20 cm (7.9 in)
(10 cm)
below the dead air.
12 in
(30.5 cm)
Maximum
Figure 2
WALL
Figure 3
NOT IN
THIS AREA
in
ANYWHERE IN
THIS AREA
3
ft
3
ft
(0.9 m)
(0.9 m)
NOT IN
THIS AREA
ANYWHERE IN
THIS AREA
20 cm
TOP OF
NEST PROTECT
90 cm
3
ft
(35.4 in)
(0.9 m)
4
in
NOT IN
THIS AREA
(10 cm)
(7.9 in)
Maximum
13