Ahh... so you've decided to to make em recirculate eh? Nice. I would say you could just go buy all the parts for cheaper, but at 30 bucks, its probably worth it to not use up your time. I know Ive spent butt loads of time getting my stuff set up. I kinda wish I had gotten one of these grow tents instead of building my own cab. The only thing is Im making my cab sealed so that no contaminates can come in except when you open the door to check on things. Has been a real pain in the ass.