Setting up a small grow box. I don't have a drill. I was planning on making it out of wood until I realized that. But, my real question is... Is there anyway to make a carbon filter without using a duct fan?(I have two PC fans). And will a PVC frame with some kind of thin wood material glued to it be air tight enough to hold in smell? It's going to be a pretty small box, so I don't want to waste so much space with big duct pipes. Or, any other air scrubbing techniques you guys have out there!