Passive air conditioner Jun 13, 2016 23:43:00 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by jimustanguitar on Jun 13, 2016 23:43:00 GMT -5 www.iflscience.com/environment/these-diy-ecofriendly-air-conditioners-are-cooling-down-bangladesh/Reminds me of the water bottle lightbulb that went viral a year or two ago.