In a 4'x4' tent, I plan on setting up ventilation by sticking a 440 CFM fan outside, connect it to a carbon filter (also outside) and then run a duct from the filter to the top of the tent. Then the duct will connect to a Y-shaped duct connector inside the tent. The bottom part of the connector will remain open to provide fresh air to the tent. The other end of the connector will have a duct running through my cool tube reflector and then out the other side of the tent, as a heat exhaust. This way I'm using one fan to supply and remove air. I figure if I leave an opening at the bottom of the tent, it will also create some sort of air flow. Do you guys think it's not smart to set it up this way? If so, please explain why and also let me know a better way to do it, even if I need an additional fan or something. Maybe this terrible drawing will help somewhat. The arrows represent direction of air flow.