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• For mobile home installation, select locations carefully to avoid thermal
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).
MOBILE HOME INSTALLATION
Modern mobile homes have been designed and built to be energy efficient.
Install smoke alarms as recommended above. In older mobile homes that are
not well insulated compared to present standards, extreme heat or cold can
be transferred from the outside to the inside through poorly insulated walls
and roof. This may create a thermal barrier which can prevent the smoke from
reaching an alarm mounted on the ceiling. In such units, install the smoke alarm
on an inside wall with the top edge of the alarm a minimum of 4” (10 cm) and
a maximum of 12” (30.5 cm) below the ceiling.
If you are not sure about the insulation in your mobile home, or if you notice
that the outer walls and ceiling are either hot or cold compared to the room
air temperature, install the alarm on an inside wall. NFPA 72 (National Fire
Protection Association) requires smoke alarms be installed in each sleeping area.
WARNING: Test your smoke/CO alarm operation after mobile
home has been in storage or unoccupied and at least once a week
during use.
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