Energy-saving potential of large housing stocks of listed buildings, case study: l'Eixample of Valencia

A significant part of the European residential building stock is architectural heritage and is protected by law in different grades. Although these dwellings seldom fulfil the current eco-efficiency requirements, listed buildings are exempt from energy regulations requirements. This paper reviews the constructional characteristics common to 588 multi-storey listed buildings (circa 6000 dwellings) located in l'Eixample district in Valencia (Spain). The poor thermal performance of these buildings proven by this study reveal a significant potential for saving energy and reducing CO2 emissions, particularly when considering the current requirements fixed by the current Spanish building code. Retrofitting measures intended to improve the thermal behaviour of these buildings, while being respectful to their listed nature, are proposed and assessed in terms of energy demand, air pollution and economy.