Almost all computer users, especially PC gamers, would prefer their machines not to emit heat at all. In fact, a whole market exists to offer different, and sometimes almost insane, ways to cool down computers. There are times, however, when heat output is unavoidable, like when it comes to server farms. French computing company Qarnot has designed a way to turn that fact of life to people's benefits. First is to distribute computing power across the Internet instead of locating them all in a single physical space. The second is to reuse the heat from those nodes to provide heating for homes. Introducing Q.rad, claimed to be the world's smartest heater.