I have a window unit that i use so the air vent to my room is closed, and useless. It still has cracks in it though so Im sure air is still coming from it a little. I have never lived in a room before where the dust is this horrible. Ill vacuum, dust and do anything to clean then within a day I have dust again. Its a light blanket over all surfaces. I pregnant, and its important that I don't get sick and the dust is making me keep a stuffy nose at night, making it hard for me to breath through my nose while I sleep so its making me breath through my mouth and I wake up frequently with horrible cotton mouth. We are moving within 6 months but I can't take this for that long anymore. So any suggestions will help. Thank you all.