cigarette smoke question
I have plans to move into a new apartment (have to tell them yes or no on Monday) and just learned that the people above me smoke cigarettes. I'm on the second floor with one other apartment and their apartment takes up the entire third floor (it's a converted house). I have health issues and can't stand the smell of smoke. I'm wondering if I should find another place or if I can assume that the smoke will go upwards since they are higher than me? Anyone have any thoughts? I haven't moved in yet and can still get my security deposit back easily. thanks.