The history of keeping cool

POSTED: 09:24 AM PDT Jul 18, 2012 

Look back at the history of fans, air conditioners and other ways humans have tried to stay cool through the centuries.

Cooling - Office AC
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In the 1940s and 50s, air conditioners were marketed to offices as a way to increase productivity. The industry had stats to back this up, including one study that showed typists in a cooler office increased output by 24 percent, according to Time.

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