EcoDataCenter is the world's first climate positive data center. Cost efficient and with world class performance. It is designed to meet the highest possible security standards. EcoDataCenter is a paradigm shift. A stand for a sustainable future.

The main factor in EcoDataCenter’s carbon negative status lies in its connection to the local district heating system, which allows it to make good use of the significant amounts of heat generated by the servers inside. The district heating system in Falun won an award in 2013 from the Global District Energy Climate Awards as one of the best in the world, and uses heat from the servers to warm local buildings in the winter. In the summer, excess steam from the local electricity plant will run the machines that cool the data center.

More here: http://ecodatacenter.se/en/