The finished part of my basement is kinda small, but I can comfortably fit around 6 people to watch a movie. Problem is this part only has 1 vent; which is partially blocked by a couch. I put a fan down there but it's too loud and simply opening the doors doesn't help much. As you can imagine it gets muggy and even smelly after a while. Would a de-humidifier work or would I have to bite the bullet and get another vent or 2 installed down there? Thanks for any input.