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1. RECOMMENDED LOCATIONS FOR ALARMS

• Locate the first alarm in the immediate area of the

bedrooms. Try to protect 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 to protect any stairway as

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.

humidifiers).

• Locate an alarm in every room where someone sleeps

with the door closed. The closed door may prevent the

alarm 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.

• For mobile home installation, select locations carefully to

avoid thermal barriers that may form at the ceiling. For

more details, see MOBILE HOME INSTALLATION below.

• When mounting an alarm on the ceiling, locate it at a

minimum of 4" (10 cm) from the side wall (see Figure 1).

• When mounting the alarm on the wall, it is best to 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, (see Figure 1).

• 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). NFPA 72 states: "Smoke alarms

in rooms with ceiling slopes greater than 1 foot in 8 feet

(.3m in 2.4 m) horizontally shall be located on the high side

of the room." NFPA 72 states: "A row of detectors shall be

spaced and located within 3 ft (0.9m) of the peak of the

ceiling measured horizontally" (see Figure 3).

FIGURE 1

DG333Manual

portable

heaters

Page 2 of 6

FIGURE 2

FIGURE 3

MOBILE HOME INSTALLATION

Modern mobile homes have been designed and built to be

energy efficient. Install smoke alarms as recommended

above, refer to RECOMMENDED LOCATIONS and Figure

1. 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

that 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 4" (10 cm) and a maximum of 12" (30.5 cm)

below the ceiling (see Figure 1). 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, install the

alarm on an inside wall. For minimum protection, install at

least one alarm close to the bedrooms. For additional

protection, see SINGLE FLOOR PLAN in Figure 2.