thats the thing, my cool air is currently being pulled from outside. i am thinking i need to have my intake coming from inside the house... i tried plugging the vent up with a sweat shirt in hopes that the humidity would drop (and air would be pulled from under the door) it only dropped two degrees... will my plants get enough fresh air in the room if i completely seal up the vent and it pulls from outside the room? i could then set up a d/h outside of the room to keep the humidity low... would this be a problem as long as my temps stay down? for now temps have been absolutely fine