Apartment Closet Grow, need ventilation advice...

Ok, so here's the situation I'm running into. I'm getting ready to start my first grow, and I'm trying to get everything planned to a T so I can get the room set up and just focus on the plants. I'm not sure as to the size of the closet yet, as I have to check out the apartments in the new city I'm moving to, but hypothetically lets say it's 4x5x6. I will be running a Lumatek 600 watt (electronic ballast), DWC setup (recirculating on 2nd grow), and using one of the homemade bucket/PC fan setup for odor control. Now, my biggest damn problem is ventilation. I know you should have fans setup in the growroom, especially one blowing air between the plants and the light, but I have no clue as to what I should do to exchange air in and out of the closet! I see people with the squirrel cage exhaust fans, and then they have tubing exhausting the air into another room or outside- but this is not feasible for me. I will not be able to drill any holes in the wall (aside from small ones to hang the light). So what should I do for ventilation? Just leave the closet door open? Won't the air in the room eventually become stale? Leave the door open and open a window as well? Thanks for any responses, this has been driving me batty for some time now.

I had the same dilemma, and eventually decided cabinets have some significant advantages over closets, one of them being that you can drill and saw all you want on the cabinet and nobody's gonna care. Unless you're just married to the closet idea, I'd seriously consider a cabinet or two.

^^ exactly .02cents

cuz intake and outake are going to be important factors - the disadvantage is that the cabinet(s) will take up more room esp. in apartment style living.

say when you are in the dark period... what are you going to do, you cant open the closet door for air cuz then you will be letting light in.

You should exchange all the air (volume) in your room every 5 minutes... unless you're running a/c... and CO2...

Are you going to have an a/c in there?

Just compute the room's volume, and have a fan that will pump that every 5 minutes.

This helping any?

Afraid I'm still not getting what I need. Here's some more info. I am moving into a 2 bedroom townhouse. 1 bedroom will be used for it's intended purpose, the other will be turned into a study. The room that is being turned into a study, I will be using that walk-in closet for my grow. I would not per se need to keep the door (to the closet) closed, but would like to have the option if guests show up. So my thoughts were that I could leave the closet door open, and maybe put one of the el cheapo intake/exhaust fans in my window in the study to get some fresh air in there, but would this be enough?

Even if I build a cab, where am I exhausting the air to? Remember, no holes in the walls. Also, the room (the study) will be air conditioned.

around my city we have a store called "habbitat for humanity"....there you can buy cheap doors. what i would do is take the door you have no off and exchange it for a cheap door, that way you could cut into the cheap door for exaust fans and such, and when you move out just put the previous one back on....