Can Underground Thermal Batteries Warm Northern Cities in Deep Winter?
Having grown up in Canada’s north and spent far too many winters trudging through snowy downtown streets in Toronto, Ottawa, and Edmonton, I know firsthand just how brutal Canadian winters can be—and how urgently our cities need practical, scalable, low-carbon heating solutions.
Cities like Edmonton face annual heating demands measured by around 5,000 heating degree days—a fancy way of quantifying just how relentlessly cold a place is. A “heating degree day” is simply one degree Celsius below a baseline of 18°C, accumulated over each day throughout the year.
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