Indicateurs énergétiques specifiques aux fa ades ventilées et vitrées (Energy indices specific to ventilated and glazed facades)

The evaluation of the energy performance of ventilated and glazed fa ades can be done based on specific indexes. The paper presents two of those, defined as a function of season, i. e. the preheating efficiency index for the cold season and the dynamic isolation efficiency for the hot season. A study was performed concerning the evolution of the two indexes in different climatic conditions, specific to Romania. The functional correlations were obtained for a ventilated and glazed fa ade model, by varying the specific parameters one by one. The results were presented as correlation diagrams by which the characteristic of ventilated and glazed fa ades can be determined.