Ok well i have never grown herb on my own before but i have helped my friend who has a cannabis card grow his.. I know enough about it how to germinate.. ect. So ive decided to start growing. In my room i made a under the house acces, i am thinking about digging down 6 feet and lining the 6ft deep by 2ft wide hole with plywood. at the bottom of the hole in the ply wood i would run a 3 1/2 inch pvc pipe up to ground level. That would be my air in and i would have another pipe running at ground level into the box and that would be my air out. I would have fans on both and a carbon filter on the end of the out duct. I would use 1 HPS light.. does that sound like an ok little grow box that will be conceled? Please give me suggestions and tell me if you think it would be worth it..