Why is it not used again and wouldn’t it be very efficient to combine with a heat pump for reuse?
Especially since water from shower or sink isn’t usually very dirty, couldn’t it be stored for a while in an isolated tank so that e.g. a heat pump can run more efficient on it than on usually colder air or colder ground water?
In: Engineering
Vancouver does this for the False Creek neighbourhood https://vancouver.ca/home-property-development/southeast-false-creek-neighbourhood-energy-utility.aspx
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