The neglected clean heat we flush down the drains

        January 3, 2024 BBC | Vancouver | renewables: waste

Heat from bathtubs, washing machines, and dishwashers heats 6,210 Vancouver apartments. Hot water in sewage pipes is easier to harness than in air. A heat pump converts 20C sewage to 80C. Waste water in the UK could heat 1.6 million homes and in the US 30 million homes. 80% of home energy is heating, cooling, and hot water via natural gas.