There are several ways to keep your computer cool, such as an internal fan, external fan, liquid cooling and some other ways. Someone out there decided to do something radically different and hooked up a dryer ductwork to harness the outside air to cool his machine. The system uses a window insert along with a dryer hood to suck in the outside air with a PC fan. Of course, you’d probably do this during the winter or sometime cool, and not during the searing heat of the summer. You can check out more pictures of this case mod, and hopefully a prankster won’t decide to suddenly pump water into this from the outside.