one of the items left here by the previous tenant was a three stage activated carbon hepa filter, which she seemed to use for her cat. the air quality has not been too bad, actually, but an overwhelming stench of pot or gasoline (it wasn't clear) took over about 6:00 am in the morning and was still going by 9:00 am. the heroin addicts upstairs are getting evicted this week, so i'm going to be patient about second hand smoke until they're gone.
this plug-in device, which pulls air from the room, filters it, and puts it back, has been running for about 7 hours, and the air is noticeably cleaner to breathe, even if the smell is actually still lingering. it's hard to get rid of the stench of mariijuana when gross people smoke inside for long periods.
it needs a new filter, but i'll hang on to this.