If you’ve ever been to Paris, you’re sure to have walked over one of the many grates that are venting hot air out of the metro system. Seeing as the trains are running underneath the apartments of Paris, it only seems natural to want to harness this heat and use it to actually heat buildings instead of just venting into the outdoors (although I’m sure the many homeless people rely on the vents to stay warm in the winter).
So a building close the the Pompidou Modern Art gallery is being renovated in order to be heated in such a way. It’s already connected to the metro through a staircase, giving an easy access to the warm metro air. It’s a form of geothermal heating and should save on heating costs and reduce carbon dioxide emissions.
via Planet Ark