question for the stoners

[feanan]

I have a, umm, friend, who's going to be
moving into a new building soon.

Doesn't want to be known as the building stoner,
as of now she lives on the top floor and just
blows smoke out the window, hasn't been an issue.

But, now she's moving into a ground floor unit,
and that's not really an option.

So, what are some good methods of dealing
with the smoke/oder/etc in a closed environement?

Given the perceived number of stoners who play on the server,
there must be a bunch of good methods floating around out there.