The Edificio Londres, a residential building in Barcelona, is an example of architectural innovation and where a variety of energy saving concepts can be applied. A holistic energy concept, which was then elaborated in a coherent design, combining innovative and low-tech features, has been applied.

Within the REPLACE project, this best practice shows an energy efficient renovation made to an apartment of a 1850 building. In particular, the heating system has been replaced to an air-water heat pump which has allowed to reach energy savings.

The architecture of this multi-functional building strengthens the conditions for a strong inside-outside relationship, enforces human-nature ties and environmental awareness. Dry wood construction and bio-based materials have been used to reduce the carbon footprint. It also uses renewable energy, such as solar photovoltaics, wood boilers and heat pumps.