i live in a smell one bedroom condo. all the houses are obviously connected, so would my neighbors than be able to smell my plants through the wall at all? i know this is a fucking dumb question.
doubt it unless u got a big ass hole between the 2.... nobody smells anything next door from me on either sides... air cant get through a wall unless there's a hole.
Make a carbon filter way cheaper than buying one really I dont know why people even buy them when making it is dumb easy and 3/4 the original price, search for it and you will find many designs theres like 3-4 Ive seen so far good luck.
It won't go through walls, but it will seep under doors, and into your landing. You may be lucky, you may not. Activated carbon is the way. -mu