Exhaust Fan for Grow Tent?

I have a 2x2x6 Grow Tent. Running CFL's. Going to 12/12 soon, and am wondering what type of Exhaust Fan I should use, running passive intake down below, along with clip fan in tent, and oscillating fan when tent is open/lights on. Not alot of heat but want to be able to vent and circulate the air during lights out, and humidity control.

Any reccs? Not trying to spend too much, but dont want something that wont push/suck the air out. Also, any reccs for a carbon filter, or some type of combo? Can vent into room, but odor control?

Thanks.