أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
You can install it exposed in the rooms too.
Thats not mandatory to be embedded
It is a general practice to install fire alarm conduites exposed even in rooms as well becasue they need multiple joints in the future. They are preffered in corridors because of more danger of fire in corridors.
in carridors it might be subject for extentions or new connections thats why