Recycling Heat In Sweden

Sweden has been getting lots of rave reviews from the environmental community for the efforts they have made to become carbon neutral. Well they just took it up a notch by developing plans to recycle heat. It's a simple idea, one that makes you think "why didn't I think of that?" And honestly the best ideas are simple ones.

What they have done is devised a way to take the heat generated by the many daily train commuters in a busy train station and draw that air into an adjoining office building. Engineers believe that the plan will support up to 17% of the buildings heating needs. Not bad for free heat.

On a more domestic note we see these large heating exhausts for buildings being discarded under the sidewalks. How hard would it be to reuse that heat into other buildings?

Source: Green Daily