Here is something that will help on the hot days:
http://www.instructables.com/id/Homemade-air-conditioner/?ALLSTEPS
http://www.instructables.com/id/Portable-12V-Air-Conditioner---Cheap-and-easy!/?ALLSTEPS
http://www.instructables.com/id/Homemade-air-conditioner/?ALLSTEPS
http://www.instructables.com/id/Portable-12V-Air-Conditioner---Cheap-and-easy!/?ALLSTEPS
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