To heat an apartment or office by recycling the heat emitted by computers is the credo of the young company, Qarnot Computing, which was founded in 2010. It is a device that can make the processing power of its IT servers available remotely to businesses. And our solution is both economical – as it costs three times less than using a data centre – and environmentally friendly. With their advantage of providing free heating, the Q-rads are of interest to social landlords, bank branch networks, etc. Qarnot Computing, which employs twenty-three members of staff in Montrouge, to the south of Paris, predicts a turnover of 1 million euros in 2015, compared to the 350,000 euros achieved in 2014.