We don't have A/C in our house and have been able to rely on ceiling fans and open windows at night to keep us relatively cool. Last year was a scorcher and this one is expected to be worse. The methods above won't cut it. I'm afraid to put in an AC unit for fear that we'll have it on all the time and the electricity bill will go through the roof. Here are some ideas... has anyone deployed these, and if so, what are your thoughts / comments / suggestions? 1) Air Vent on roof: I've heard these work pretty well for alleviating the heat in the attic: http://www.airvent.com/homeowner/products/staticVents-windTurb.shtml 2) Evaporative / swamp coolers: I hear they are cheap to run, but there are cons (only cool down the air so much and cause dampness throughout). Any thoughts on these and other ideas to keep my family nice and cool?