Kidde KN-COSM-BCA User Manual page 14

Installation
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!
12