Hello, This is my first time growing and I bought a grow tent that I have indoors in an outside shed. I tried growing a couple plants and they seemed to be struggling due to not having enough fresh air. I have a box A/C unit in the shed since I live in a typically hot climate (though we do have some cold winter temps), but it didn't seem to provide enough oxygen on its own. I had all my passive intakes closed which may have been the problem, but I'd like to introduce an active system before I give it another go. So first I'd like to know if I need to drill a hole in the shed wall to add my ducting for the intake fan, or if it's recommended to just have the intake fan pull from inside the grow room. I figure it would be best to pull from outside to get as much oxygen as possible & since I don't want to constantly be opening the doors and windows on the shed to keep it as stealth as possible. Second question is about my exhaust fan. I have my exhaust fan connected to a carbon filter which I have just laying next to my tent inside & now that I think about it, it's probably working against my A/C unit. So, should I add another hole in the wall of the shed leading outside to vent the hot air out as well?