I live in a 1 1/2 story house and my uninsulated attic gets extremely hot in summertime. I have two windows upstairs in the attic (one on each end of the house) which I open to get a cross breeze. This seems to help but it is a pain to open and close them every day. I do not have any vents in the soffit but plan on doing so. Can anyone suggest a recommended spacing for the vents? Also, I'm considering installing an attic fan but have heard mixed reviews. Any suggestions? The home is located in Chicago.