So this is my first project. I was working on plans for a box to put in the garage, which seemed like an ideal place until I realized that there is no vent. Shit. Well I have a room air conditioner that I don't use, and - forgive me if this is a stupid idea - could I just place it in the garage with the box and connect it to the intake fan on the bottom of the box? The garage is on a ground floor and gets very little sun. It's not all that hot now but I'm worried the summer is gonna change that. The box will be 2.5 by 4.5 by 6 feet and I won't be using anything hotter than a 600 watt hps. Will the A/C even help without drawing air from outside the room? Do I even need it or will having an intake and outtake fan in there be enough? The garage will open and shut a few times a day so some fresh air comes in. My alternative locations are small and more troublesome. I don't wanna just give up on this. I'm stoked and wanna make this work. Please help.