A Rain Harvesting System is present inside the Smart Energy Building. The rainwater is collected from the roof by the gutters and, after passing through a filter, is stored inside an underground 5000 liters storage tank. The tank is equipped with a water level control that allows, in case of exceeding the maximum capacity threshold, to discharge the additional rainwater to the Savona Campus storm drain system.

The stored water is then pumped into the building and used for toilet flushing and for garden irrigation. If the water level inside the thank falls below the minimum value, the water is integrated with that one coming from water mains. An electric meter is connected to the hydraulic pump in order to measure the power consumptions.