Indoor Air Quality in Domestic Environments during Periods Close to Italian COVID-19 Lockdown.

This paper describes the in situ monitoring of indoor air quality (IAQ) in two dwellings, using low-cost IAQ sensors to provide high-density temporal and spatial data. IAQ measurements were conducted over 2-week periods in the kitchen and bedroom of each home during the winter, spring, and summer seasons, characterized by different outside parameters, that were simultaneously measured. The mean indoor PM concentrations were about 15 μg m in winter, they dropped to values close to 10 μg m in spring and increased to levels of about 13 μg m in summer.