Links:
[1] http://coac.arquitectes.cat/en/node/9578
[2] http://icaen.gencat.cat/web/.content/01_estalvi_i_eficiencia_energetica/documents/arxius/160505_Errors-frequents-a-la-certificacio.pdf
[3] http://coac.arquitectes.cat/en/javascript%3Ahistory.back%281%29