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1. Recommended Locations for Smoke Alarms
• In homes that are not well insulated, 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. If you are
not sure about the insulation in your home, or if you notice that the
outer walls and ceiling are either hot or cold, install the alarm on an
inside wall. In such homes, install the smoke alarm 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 (see Image 2A).
• Install Smoke Alarms on sloped, peaked or cathedral ceilings at or
within 0.9 m (3ft) of the highest point (measured horizontally). NFPA
72 states: “Smoke alarms in rooms with ceiling slopes greater than
0.3m in 2.4 m (1 ft in 8 ft) horizontally shall be located on the high
side of the room.” NFPA 72 states: “A row of detectors shall be
spaced and located within 0.9m (3 ft) of the peak of the ceiling
measured horizontally” (see Image 2B and 2C).
IMAGE 3
BEDROOM
FAMILY ROOM
WORKSHOP
BASEMENT
KITCHEN
HALL
GARAGE
MASTER
BEDROOM
FIRE
EXTINGUISHERS
SMOKE
ALARMS
CARBON
MONOXIDE
ALARMS
TALKING
SMOKE/CO
ALARM
TOTAL HOME PROTECTION
ANYWHERE IN THIS
AREA
30 cm (12")
IMAGE 2D
Install Smoke Alarms on tray-shaped ceilings (coffered ceilings) on the
highest portion of the ceiling or on the sloped portion of the ceiling
within 30.5cm (12”) vertically down from the highest point (Image 2D).