Subway (and Subway Riders) To Heat Apartment Building

Heat emitting from riders of the Paris Metro and from the subway trains will heat 17 apartments in a new system debuting in France.
September 9, 2010, 7am PDT | Tim Halbur
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Clay Dillow writes:

"The system will tap the caloric heat emitted by the passengers milling about below ground as well as the heat generated from trains moving on the tracks, and funnel it through an underground corridor to heat exchangers that will push warm air through the building's pipes. The system isn't stand-alone, but will be supplemented by district heating."

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Published on Wednesday, September 8, 2010 in Popular Science
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