Cavius 2104-001 User Manual page 17

For catheral or peak ceiling or wall installation:
The smoke alarm should be a minimum of 30 cm and maximum of 50cm from
the ceiling.
With a minimum of one smoke alarm per floor
and a maximum distance between smoke alarms of 10 meters.
Ceiling
Wall
14
Ceiling
Minimum 30cm and
maximum 50cm
from ceiling