4"
(10 cm)
CEILINGMINIMUM
DEAD AIR
SPACE
BEST NEVER
HERE HERE
ACCEPTABLE 
HERE
FIGURE 1
4"
(10 cm)
MINIMUM
12"
(30.5 cm)
MAXIMUM
SIDE
WALL
| NOT |
| IN THIS |
| AREA |
4" | ANYWHERE |
(102 mm) | IN THIS |
| AREA |
3' | 3' |
(0.9 m) | (0.9 m) |
| NOT |
| IN THIS |
|
| MULTIPLE | |
SINGLE FLOOR PLAN | FLOOR PLAN | ||
BEDROOM KITCHEN | BEDROOM BEDROOM |
|
|
|
| BEDROOM | HALL BEDROOM |
LIVING ROOM | BEDROOM |
|
|
●SmokeAlarmsforMinimumProtection | LIVING | KITCHEN | |
ROOM |
| ||
● SmokeAlarmsforAdditionalProtection |
|
| |
▲ Ionization Type Smoke Alarms with | BASEMENT |
| |
Hush® Control or Photoelectric Type |
|
| |
FIGURE 2
AREA |
|
ANYWHERE | 4" |
IN THIS AREA | |
| (102 mm) |
3' |
|
(0.9 m) |
|
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 addition- al protection, see SINGLE FLOOR PLAN in Figure 2.
WARNING: TEST YOUR SMOKE ALARM OPERATION AFTER R.V. OR MOBILE HOME VEHICLE HAS BEEN IN STORAGE, BEFORE EACH TRIP AND AT LEAST ONCE A WEEK DURING USE.
2. LOCATIONS TO AVOID
•In the garage. Products of combustion are present when you start your automobile.
•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.
