Don’t get me wrong its much better than without it, but not perfect.

Next thing they tell you is to open a window in the basement and draw up the basement cool air into the house, this works pretty good however when its 90 degrees out side the temp in the basement climbs very fast.  It takes about 30 minutes to get the basement from 68 to 78 at those temps.

To try to get this to work better what I have done is take my old evaporative cooler, which is a big window one, and put it in a basement window.  With the additon I don’t have an upstairs room to put it in like we used to so I didn’t think I could use it.  Of course cold air doesn’t rise so basically this only cools off the basement, however used with the whole house fan, you get a steady stream of very cool air up the basement stairs.  I used this yesterday which wasn’t too hot, about 85, and I sucessfully cooled the main living room back to 72 degrees.  I’ll have to keep trying this to see how it works out on really hot days.