Why can't a person use oxygen if they live in a basement apartment?

Question

My newest client is supposed to be on oxygen therapy but because she lives in a basement she can't use it. So she has to find another place to live. I'm just wondering why the basement is an issue.

Answer 1

oxygen if highly flammable and most basement apartments do not have a very good ventilation system(if any) and it can build up and cause a explosion.

Answer 2

As a guess, most basements have furnaces, which means an open flame. Obviously this isn't a good place to have oxygen.