Okay, so I've been reading all over the internet for hours a day for the past week trying to learn more about growing, etc. I just joined grasscity a couple days ago as it was my favorite community of the ones i visited. Before I begin my grow, I need to finish my box which is what i'm beginning now. I could build my own actual box or use a plastic tote, but i found an old pc and I had some questions about ventililation in this pc box. I apologize for the poor quality photos. The camera is shattered on my phone. Anyway, as you can see in the back of the first photo, there are holes in the back of the case. As well as a large hole in the top right. (that is where the exhaust fan would go). In the second photo, there are holes up under neath of that opening that leads into the inside of the case. In order to grow this, i NEED it to be stealth. My only concern is the smell. Would these holes act as a passive air intake or would they release the air from inside out of them? I plan on having one exhaust computer fan pulling air through a carbon filter. Will this be enough? The main question is, would it be safe (as in smell) for me to go through with this pc grow instead of building or buying a different box?