BRK electronic 4120 AC Avoiding Dead AIR Spaces, Follow the installation recommendations below

AVOIDING DEAD AIR SPACES

FOR STANDARD, FLAT CEILINGS

“Dead air” spaces may prevent smoke from reach- ing the Smoke Alarm. To avoid dead air spaces,

4" 4"

Do not install top of ￿

smoke alarm lower than ￿ 12" (305 mm) from the ￿ wall/ceiling line

Best Location ￿ (center of ceiling)

Acceptable ￿

Location

Dead Air Spaces￿ (4" or 102 mm)

follow the installation recommendations below.

On ceilings, install Smoke Alarms as close to the center of the ceiling as possible. If this is not possible, install the Smoke Alarm at least 4 inches (102 mm) from the wall or corner.

For wall mounting (if allowed by building codes), the top edge of Smoke Alarms should be placed between 4 inches (102 mm) and 12 inches (305 mm) from the

FOR SLOPED CEILINGS￿

(i.e. great rooms, condominiums, dormers)

Install first ￿ smoke alarm ￿

3 ft in this target area (0.9m)

If required, ￿ install additional ￿ smoke alarms ￿ along the slope.

￿wall/ceiling line, below typical “dead air” spaces.

On a peaked, gabled, or cathedral ceiling, install the first Smoke Alarm within 3 feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke Alarms may be required depending on the length, angle, etc. of the ceiling's slope. Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.

FOR PEAKED CEILINGS￿ (i.e. Cathedral ceilings, A-frames)

3 ft (0.9m)

Install first ￿ smoke alarm ￿ in this target area

If required, ￿ install additional ￿ smoke alarms ￿ along the slope.

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