How do people get away with not putting a window in a bedroom? Surely you have a law covering such things? We do here in Australia.It is shameful for any parent to expect their child to sleep in such conditions.I should demand a window be put in.Apart from that I doubt anything will make much difference without fresh air.

With no other opening but the door your only choice is a dehumidifier. They come in several sizes, for only one room you could get the smallest one you can find.

My room is always so humid and stuffy, its small like a box and has no windows, all I have is a ceiling fan and a little fan that I keep on my dresser, is there anyway I can lessen the humidity besides always having my door open?