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7. Recommended Locations For Smoke And Carbon Monoxide Alarms
• Locate smoke alarms in all sleeping areas. Try to monitor the exit path as the bedrooms are usually farthest from the
exit. If more than one sleeping area exists, locate additional alarms in each sleeping area.
• Locate additional alarms in stairways, because stairways act like chimneys for smoke and heat.
• Locate at least one alarm on every floor level.
• Locate an alarm in every bedroom.
• Locate an alarm in every room where electrical appliances are operated (i.e. portable heaters or humidifiers).
• Locate an alarm in every room where someone sleeps with the door closed. The closed door may prevent an alarm
not located in that room from waking the sleeper.
• Smoke, heat, and combustion products rise to the ceiling and spread horizontally. Mounting the smoke alarm on the
ceiling in the center of the room places it closest to all points in the room. Ceiling mounting is preferred in ordinary
residential construction.
CEILING
BEST
NEVER
HERE
ACCEPTABLE
HERE
Note: measurements shown
are to the closest edge
of the alarm.
10 cm
(4in)
MINIMUM
DEAD AIR
SPACE
10 cm
(4in)
MINIMUM
HERE
30.5cm
(12in )
MAXIMUM
CEILING
BEST
HERE
ACCEPTABLE
HERE
Figure 7-A
10 cm
(4in)
MINIMUM
DEAD AIR
SPACE
10 cm
(4in)
MINIMUM
NEVER
HERE
30.5cm
MAXIMUM
ANYWHERE IN
THIS AREA
NOT IN
THIS AREA
(12in )
30 cm
(12in)
11
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