Worried about air-flow..please advise.

Hi all,
I plan on converting a 9x10 room into a grow room. Here's my corcern: There are no windows in the room, and I'm worried that just a few circular fans in the room won't be enough. Also, it's on the ground level in an apartment complex, so it's not like I can tap into the roof system, although I wish I could :) Anyways, have any of you had good success with fans? I've heard about CO2 filtration, but that seems a little too much for me. Any other possible ideas for how to get fresh air in/out, or anything else I'm missing? All help is appreciated. Thanks.

Fan_of_bud

If it's a sealed room you're going to need some co2. With out fresh air the plants will suffer.