Hi,
Get 2 exhaust fans... 1 to bring air in and the other to suck air out. Also if the space around your tent (the room, basement, etc.) Is humid....you may need to try to lower the humidity in there..because that air is going into the grow space.
Sometimes an air conditioner can work...but not a swamp cooler(it adds too much moisture).
Good luck, at least maintain constant airflow by 1 way or another. ✌️