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i want to start growing in my attic but i need to rig up some sort of ventalation system, my attic wall has a hole in the wall so i can run it outside no problem, but how can i rig up a lil fan and such, i need it to be fairly cheap, and pretty quiet. i probably dont make much sence right now. thanks for your help

heres a better question, i was thinking about it and if its in my attic and i can just run a hose with a fan for ventalation, would i need to hook it up to a carbon filter? would you be able to smell it outside really well? im on the 3rd floor so i was thinking it wouldnt smell too bad, what do you guys think? oh and i have a bunch of lighting from the reptiles i own like heat lamps, uv lamps, etc. would those work instead of going out and buying a whole new set up? and im not growing alot just a couple plants, nothing huge. sorry this is so long.