my bad!
heres the deal, i'm a rookie bro and i haven't finished one grow in this setup yet. so i really haven't figured out everything, such as how long to flower,how many plants it can hold, etc.
I have four in there right now, 2 at 4 weeks, and 2 at 2 weeks. I started flowering both of them at the same time, as i don't have a seperate grow area for vegging, i have to put the younger plants on the same schedule as the older plants. It's already getting pretty crowded so i'm kinda thinking i might have to pull one out and put it outside because they are not near being done and its already cramped. Like I said, I'm still learning how to handle it.
You were wondering about heat? it gets really hot, i keep the fan on whenever the lights on. I just run a piece of 4" ducting through the top opening which has a drawstring to secure the ducting. There are three screen vents on the bottom of the growbox with velcro flaps so you can control outside light exposure. It also creates a wonderful airflow when you exhaust the air straight out the top while new CO2 is being pulled through the bottom vents up through the plants and out the top again to complete the cycle. I don't have a carbon filter because I'm strapped for money atm

and I thought I can wait on that till my plants smell a little bit more. But I definitely am getting one! So if you already have that then right on.
One last thing, to my shame I am an impatient person! So when I got all the materials I needed I put this together the easiest and fastest way I could, so its pretty obvious I'm growing, the people I live with don't mind so I bought this setup more just as a place to grow and I didn't have to worry about stealth.
So here's some pics.