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Finland is known for several things, like producing fast racing drivers, northern lights, saunas, and district heating. Some say its citizens are the happiest people on Earth, possibly because of their fondness for watching those northern lights while sitting naked in an outdoor sauna with friends as they imbibe potent libations. It is also known for being quite chilly at times, which means it has placed a heavy emphasis on keeping its built environment warm during the winter months — which is to say between August 15 and July 9th of the following year.
Many European cities use district heating — something that is unfamiliar to most Americans. Instead of having individual furnaces in every home and building, they produce heat in bulk and distribute it to all the buildings in the…
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