Nowadays, the concept of outdoor air quality is gaining interest, especially considering the impact that air pollutants have on people's health.This relevance is also clarified by the introduction of the assurance of people’s health and wellbeing as an objective for all countries within the Sustainable Development Goals by the United Nations.Surely, the problem is particularly relevant in the urban context, mainly for two reasons.Firstly, since anthropogenic activities represent one of the main sources of pollutants, urban areas tend to present a higher level of concentration of local air pollutants, rather than rural places. In particular, it was estimated that 30% of all air pollutant emissions come from the heating systems in the building sector.