Links:
[1] http://coac.arquitectes.cat/en/node/9575
[2] http://icaen.gencat.cat/web/.content/01_estalvi_i_eficiencia_energetica/documents/arxius/160505_Errors-frequents-a-la-certificacio.pdf
[3] http://icaen.gencat.cat/ca/pice_ambits_tematics/pice_l_energia_als_edificis_i_serveis/pice_certificacio_edificis/pice_faqs/#27
[4] http://coac.arquitectes.cat/en/javascript%3Ahistory.back%281%29