The Trinitat Nova neighborhood in Barcelona is part of a district built during an era of expansion in the city. It was built in response to this growth and did not take into account some of the needs of its people, much less energy-related matters. In a bottom-up process promoted by area residents, the neighborhood has been undergoing a complete rehabilitation since the late 20th century with the support and assistance of the competent authorities (the Barcelona City Council and the Government of Catalonia).

AIGUASOL performed various studies and projects with the aim of determining specific energy planning and guidelines, both for the planned rehabilitation of residential buildings and for the approaches used in the district heating systems. We also carried out studies and specific energy optimization projects for the design of new buildings and analyzed elements that could be extrapolated to the entirety of the planned project.

The process of renovation began in the late 20th century and has continued, with fluctuating intensity, to the present day.

The neighbourhood process started at the end of the twentieth century has continued, with more or less intensity, until today.