Hey Looks like you got everything going alright. I tell you what setting up before you grow is smart. I started growing and building grow room all together.
As for being on a tight budget. I hear that shit. I havent spent over 10$ on my Grow Yet! Anways I have recently built a box similar to size of yours. Mine is 4x2x6 and 6" in-line fan from Home Depot rated at 160cfm u should be able to purchase one rated at 250 CFM for 5 dollars more as for passive air intake just setup your box let the fans go. Stick a lighter outside of you 90deg PVC. If the ligher sucks in the pvc you got passive intake decently. I am still newb at growing but u can check out my Grow link is posted in Signature. Good luck
-Swisha
SwishaSweetz4Me Reviewed by SwishaSweetz4Me on . Need input on potential grow space =D Hey guys, I have been reading on these forums for about 2 or 3 weeks, and I have been inspired to start my own indoor grow. I know pics are a MUST and much appreciated on here, so I will be posting some for sure when I get everything together. Potential materials include: Grow Box: 4'x4'x5or6' tall dimensions. Made from 1/4" plywood and 2x4s. I will be air sealing with caulk and the door will be weather-stripped. The inside walls will be painted with a few coats of flat white, Rating: 5