So, a friend of mine just moved into a basement apartment with one window next to the front door. (I know, it sounds a lot like mine so far but it isn't.) She gets fumes coming in through the front window when they refuel the oil for the boiler room. This is because the window doesn't seal very well and lets in outside air and fumes from outside. Occasionally, chemical smelling fumes seem to come in through the cracks in the wall or vents as well. I'm not sure which, just not from outside. One suggestion I had was to turn on the shower so that steam would increase the air pressure in her apartment and force some of the fumes out. Is that a sound idea? What you think of that?