barriers that may form at the ceiling. For more details, see MOBILE HOME
INSTALLATION section.
• When mounting an alarm on the ceiling, locate it at a minimum of 4”
(10 cm) from the side wall.
• When mounting the alarm on the wall, use an inside wall with the top edge
of the alarm at a minimum of 4” (10 cm) and a maximum of 12” (30.5 cm)
below the ceiling.
• Put smoke alarms at both ends of a bedroom hallway or large room if the
hallway or room is more than 30 feet (9.1 m) long.
• Install Smoke Alarms on sloped, peaked or cathedral ceilings at or within
3ft (0.9m) of the highest point (measured horizontally).
This equipment should be installed in accordance with the National
Fire Protection Association’s 72 (National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269).
3. LOCATIONS TO AVOID
• In the garage. Products of combustion are present when you start your
automobile.
• Normal cooking may cause nuisance alarms. If a kitchen alarm is desired,
it should have an alarm silence feature or be a photoelectric type.
• Do not install within 6 ft. of heating or cooking appliances.
• Less than 4” (10cm) from the peak of an “A” frame type ceiling.
• In an area where the temperature may fall below 40ºF or rise above 100ºF,
such as garages and unfinished attics.
• In dusty areas. Dust particles may cause nuisance alarm or failure to alarm.
• In very humid areas. Moisture or steam can cause nuisance alarms.
• In insect-infested areas.
• Smoke alarms should not be installed within 3 ft (.9m) of the door to a
bathroom containing a tub or shower, forced air supply ducts used for
heating or cooling, ceiling or whole house ventilating fans, or other high
air flow areas.
• Near fluorescent lights. Electronic “noise” may cause nuisance alarms.
• Smoke alarms are not to be used with detector guards unless the
combination (alarm and guard) has been evaluated and found suitable
for that purpose.
• Do not install near vents, flues, chimneys or any forced/unforced air
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