The energy certification has the function for certifying the performance and energy characteristics of a building, so as to allow an assessment of comparison of these characteristics with respect to the reference values established by law.

The parameters that are considered for the Energy Certification are as follows:

• The characteristics and the state of preservation of the building envelope (exterior and interior walls, roofs, floors, windows, etc..)

• The characteristics of the winter heating;

• The characteristics of the production of domestic hot water;

• The characteristics of the air conditioning in summer;

• The characteristics of artificial lighting.