Bought a Vornado 660 Large Room Air Circulator for a 26 x 13 bedroom because my bedroom is consistently 2-4 degrees warmer than the rest of the house. It also faces the west so it receives a lot of day sun. I have moved the Vornado to three different spots around the bedroom and the temperature...
My master bedroom 1, bedroom 3 and kitchen is consistently 3 degrees warmer than the rest of the house at any time of the year.
Last year I hired a professional to install blown in insulation to my attic and air sealed all windows and doors. I'd say my bedroom is covered by 90% of my attic...