Harves walls consist of modular panels installed around buildings. These panels collect rainwater from roofs and surface runoff, storing it in special tanks within the panels. Thanks to an integrated filter system, the collected water is purified of sediments and, when needed, converted into grey water, ready for use in garden irrigation, cleaning or industrial applications. The walls offer both an aesthetic and functional structure; they save water without placing additional load on the existing infrastructure and contribute to the environment by creating a microclimate effect within the city.