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Re:Heat Pumps Work Miracles by jabl on Friday March 01, 2019 @10:59AM (#19281815)
In my city, about 10% of the district heating load is covered by heat pumps where the heat source is municipal waste water.
Re:Heat Pumps Work Miracles by Scoundreller on Friday March 01, 2019 @11:08AM (#19281965)
Toronto does this for district air conditioning with incoming city water.

I don’t think they’ve bothered to calculate the effects of pumping warmer water into everyone’s air conditioned home...