I know Home Depot carries some that are real spendy, just wondered if those would make a diff or not. I guess you would get in trouble w/airflow if you get a filter that does a whole lot. If the DEQ said it was OK to use reg filters, maybe they worry more about particles, not fumes. I know a sure way to tee off neighbors in nice neighborhoods would be to dust things w/epoxy primer dust, that crap sticks to everything.