DSC MAXSYS PC4010 Instruction Manual page 30

Additional smoke detectors beyond those required should be installed
for increased protection. The added areas include: basement, bedrooms,
dining rooms, furnace room, utility room and hallways not protected by
the required detectors.
Bedroom
Bedroom
Living
Room
Basement
Figure 1: A smoke detector should be located between the sleeping area
and the rest of the family unit.
Figure 2: In residential applications, a smoke detector should be located
to protect each sleeping area.
Figure 3: A smoke detector should be located on each story of the dwelling.
Figure 4: Smoke Detector Mounting – Dead Air Space: The smoke from a
fire generally rises to the ceiling, spreads out across the ceiling surface
and begins to bank down from the ceiling. The corner where the ceiling
and wall meet is an air space into which the smoke may have difficulty
penetrating. In most fires, this "dead" air space measures about 4 in. (0.1m)
along the ceiling from the corner and about 4 in. (0.1m) down the wall as
shown in Figure 4. Detectors should not be placed in the dead air space.
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Bedroom
Bedroom
Living Room
Kitchen
Figure 1
Bedroom
Dining
Room
Figure 3
Family Room
Dining
Room
Living
Room
Kitchen
Bedroom
Bedroom
Figure 2
4"
(0.1m)
Ceiling
Acceptable
here
NEVER
HERE
Top of detector
acceptable here
NOTE: Measurements shown are to
the closest edge of the detector.
Figure 4
Bedroom
4"
(0.1m)
Max.
12"
(0.3m)
Max.
Wall