Well if you can't move anything and you dont want to keep the door open and can't move the intake. Cut a hole in the wall run some kind of hose or ducting and cover it with a plug plate to make it look like a plug.. Or dont do anything..
You have a tent in a closet ? Then that could be the problem because the passive air intake is probably not strong enough to pull air into the closet as well
People willl talk, and its natural to want to show off your success. Not even your best friend should know..
http://www.wsvn.com/news/articles/local/22004402898433/