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Sloped Ceilings
The following information is from the National Fire
Protection Association and is listed in Fire Code 72.
Install Smoke Alarms on sloped, peaked or cathedral
ceilings at, or within 3’ (0.9m) of the highest point
(measured horizontally). Smoke alarms in rooms with
ceiling slopes greater than 1’ to 8’ (0.3m - 2.4 m)
horizontally should be located on the high side of the
room. Do not place the alarm in the peak of an “A”
frame type ceiling (see Diagram B)
Mobile Homes
Modern mobile homes have been designed and built
to be energy efficient. Install Smoke/CO alarms as
recommended above. (Refer to Recommended
Installation Instructions and Diagram A).
In older mobile 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 cause a thermal barrier, which can
prevent smoke from reaching an alarm mounted on
the ceiling. In such mobile homes install your
Smoke/CO Alarm on an inside wall with the top edge
of the alarm at a minimum of 4” (10cm) and a
maximum of
12” (30.5cm) below the ceiling. (See Diagram A). 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 your alarm on an inside
wall only!
I n s t a l l a t i o n
12
Locations To Avoid
WARNING: Do not install in garages, kitchens,furnace
rooms or bathrooms! Install at least 5’ (1.5 m) away
from any fuel burning appliance.
Do not install within 3’ (.9m) of the following:
The door to a kitchen, or a bathroom that contains a
tub or shower, forced air supply ducts used for
heating or cooling, ceiling or whole house ventilating
fans, or other high air flow areas. Avoid excessively
dusty, dirty or greasy areas. Dust, grease or household
chemicals can contaminate the alarm’s sensors, causing
it to not operate properly.
Place the alarm where drapes or other objects will not
block the sensors. Smoke and CO must be able to
reach the sensors to accurately detect these conditions.
Do not install in peaks of vaulted ceilings, “A” frame
ceilings or gabled roofs. Keep out of damp and
humid areas. Do not place near a diaper pail.
Smoke alarms are not to be used with detector guards
unless the combination (alarm and guard) has been
evaluated and found suitable for that purpose.
I n s t a l l a t i o n
13
When mounting
in a hallway, the
“A” line should
be parallel with
the hallway.
When wall mount-
ing, the “A” line
should be horizon-
tal.
Install
Remove
Alignment Marks
AA