Seawater for heating housing

The seaside resort of Les Sables-d'Olonne is in the process of switching to thalassothermia. It is a matter of using sea water to heat some buildings. The construction site is impressive and gigantic. This is how it works: the sea water is collected and sent to a boiler. It rises to 80 degrees, then goes directly to heat buildings. Once used, the sea water returns to the ocean at a temperature of four degrees. (Environment). TF1 INFO