Environmental tendency from the retrofit to current time. A case study in Rome, Italy

This contribution presents the analysis of environmental data collected over the 2016-2022 period in the Hall of the historic building of Villa Blanc in Rome, Italy, with ceiling and walls hardwood paneling. Data related to three different sub-periods (during the retrofit, after 1 and 5 years from the retrofit) were analyzed in detail. Based on the ASHRAE 2019 Guidelines, it was found that thermo-hygrometric data differ among the sub-periods (specifically in the years 2016-2017, data are outside the limits of the 5th-95th multi-year band), however there is no marked risk of mechanical damage and mold germination in the prestigious wood. Finally, water vapour mixing ratio and carbon dioxide concentrations were studied as indoor tracers. Since the water vapor mixing ratio remains fairly constant while carbon dioxide concentrations have more variability, e.g., it can be assumed that people (as CO2 source) may have a more visible effect than indoor/outdoor air exchanges.