Barcelona has raised its first block of flats with an A energy efficient certificate. The building has been designed by the SAAS Studio for the Spanish government’s housing body – El Patronato Municipal de la Vivienda. This A rating belongs to a European directive for new building construction, where A is  the top and G at the bottom of the energy efficiency scale. An A rating makes an enticing prospect for anyone thinking of moving in, as they will make plenty of savings on energy ...