Poor ventilation inside confined living spaces has been identified as the main responsible of a new class of diseases, like eg Building-Related Illnesses and Sick Building Syndromes. In spite of their low concentrations, some typical indoor contaminants, like eg Benzene and Formaldehyde, are proved to be carcinogenic [1, 2]. Therefore, internal air quality (IAQ) monitoring is of paramount importance to keep safe and healthy conditions. In buildings equipped with forced ventilation, the pollutants are diluted by Heating Ventilation Air Conditioning systems, which are generally operated on the basis of fixed duty cycles. A preventive increase of the ventilation doesn't necessarily improve the indoor air quality, on the other hand it may boost up the overall energy consumption [3].In literature, the implementation of demand-controlled ventilation mainly relies on the monitoring of CO2, used as a tracer of human occupancy in confined living spaces or as surrogate of inhabitant generated pollution. This approach is inadequate to monitor IAQ, since there are many toxic compounds which are released by building materials and furnishings. Furthermore, each