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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 (Figure 7-A).
• 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 (Figure 7-A).
• Put smoke alarms at both ends of a bedroom hallway or large room if the hallway or room is more than 9.1m
(30 ft) long.
• Install Smoke Alarms on sloped, peaked or cathedral ceilings at least 0.9m (3ft) from the highest point
(measured horizontally). See Figure 7.C.
• Industry experts recommend a CO alarm be installed on each level of the home-ideally on any level with
fuel burning appliances and outside of sleeping areas.
This equipment should be installed in accordance with: (1) C22.1-12, Canadian Electrical Code, Part I, Safety
Standard for Electrical Installations; and (2) CAN/ULC-S553, Standard for Installation of Smoke Alarms.
Mobile Home Installation
Modern mobile homes have been designed and built to be energy efficient. Install smoke alarms as recom-
mended 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 at 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. CAN/ULC-S553 and
NFPA 72 require smoke alarms be installed in or near each sleeping area.
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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