Many old houses in Vermont are converted into apartments. I live upstairs in one of those old house apartments! Here is the challenge: I have Environmental Illness (Environmental Illness is like having asthma, rheumatoid arthritis, and a peanut allergy at the same time). The tenant downstairs uses toxic chemicals. There is three feet of empty space between the downstairs dropped ceiling and the upstairs wooden floor. Parts of the sub floor are missing. The landlord cannot blow insulation into the empty space because he must have access to the pipes, wiring, dryer hoses. We have filled the wood floor cracks and baseboards with foam backer rod and No VOC caulking, and purchased an Aireox Professional Air Purifier, Model 45 D. How do we block the smells rising up from the downstairs apartment? Note: Any repairs would need to be doable from inside my apartment. If you have any ideas, I'd love to hear from you.