I tried a fan blowing up and down the stairs and didnt have much luck. I read a lot of threads and decided to turn the heat on upstairs until it was equal to the downstairs. (I thought the cold air upstairs was blocking the heat from rising) I had a 6 degree temp difference before and now it is 2 or 3 degrees. It has only been 2 days so Im not sure if it will really work. Has anyone else tried this?