Ancient desert-dwellers knew better than anyone that the best way to keep a home cool was to keep it from getting hot in the first place. This is why many hot-climate homes were built close together and finished with light-colored exteriors: both of these methods helped keep the heat out. But even more amazing is the windcatcher, a passive cooling device that has been used in Asia and the Middle East for many centuries.
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From Ancient Air Conditioners to Contemporary Passive Homes : WebEcoist.
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