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search heath robinson on this site. he's awesome

Are you in the bay area?

Hey, I am in the process of building a small grow room (10x4x4) under a wooden skateboard ramp and I want to make sure no smell will come out. I alraedy made a carbon filter using a computer fan, and the room has a 12''x4" vent and a fan circulating the air. I will probably seal all of the...