In the last decades, the increasing of global population and the development of the urbanization have induced a higher consumption of resources, such as the fresh water. Forecasts estimate that the average annual rate of global water demand of 2%, will generate a total growth in 2030 of 55%. The atmosphere, containing about 12,900 km3 of fresh water,can be an alternative source for the future in order to avoid a further exploitation of conventional resources. Nowadays, different solutions are explored to develop technologies able to extract fresh water from the atmosphere. In the laboratory of the Energy Department of the Polytechnic of Turin, a prototype was assembled, with the goal of produce fresh water from the air.