and Sweden is taking advantage of that. Computers get hot enough that they have to be cooled off. This is done by a lot of fans blowing cool air in and sucking hot air out. That’s because computers get hot – and it takes a lot of fans to keep them cool enough to operate properly. The heat in most computer centers is discarded at waste. For the past few years Sweden and a few other countries do not send the heat to the waste pile. It is run back through the pipes that fed in cool air and into plants where it is distributed for heating.
The system is still in early days but Sweden expects to generate enough heat to warm 2,500 residential apartments by 2018. Long term it hopes to meet 10% of the entire heating need of Stockholm by 2035.
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