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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 10 cm (4") 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 10 cm (4") and a maximum of 30.5 cm (12") below the ceiling.
• Put smoke alarms at both ends of a bedroom hallway or large room if the hallway or room is more
than 9.1 m (30 ft) long.
• Install Smoke Alarms on sloped, peaked or cathedral ceilings at or within 0.9m (3 ft) 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 on the previous page. 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 10 cm (4”) and a maximum of 30.5 cm (12”) 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. For
minimum protection install at least one alarm close to the bedrooms.
WARNING: TEST YOUR ALARM OPERATION AFTER MOBILE HOME HAS BEEN IN STORAGE OR
UNOCCUPIED, AND AT LEAST ONCE A WEEK DURING USE.
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