“The warmth comes from showers, the toilet, wastewater from washing, from the dishwasher, from the washing machine,” says Postuma. “Together it all gives, throughout the year, a temperature between 15 and 18 degrees. And we are going to make a bypass around the main sewer, put a heat exchanger around it and bring it to the houses in insulated pipes. We place it in an electric heat pump, and the water is heated up to 60 or 70C – medium temperature.”
