The Energy Certificate verifies a building's efficiency using a predetermined scale, with A+ denoting exceptionally efficient performance and F denoting inefficient performance. It is a legally required document provided in digital form by an expert licensed by ADENE, the Energy Agency, for new construction and buildings undergoing intervention works. The Energy Certificate, which has a validity of 10 years, is currently one of the documents required by the Notaries, Land Registry Or even through the Casa Pronta service at the time of purchase and sale of a property. To read more about this topic click here.