My understanding is that it's because of what the GP cited - there needs to be an alternate way to escape the room in the event of a fire/flood/etc. A friend o

My understanding is that it's because of what the GP cited - there needs to be an alternate way to escape the room in the event of a fire/flood/etc. A friend of a friend drowned because they were asleep in a "bedroom" which was a room in a lower level without a window.