Excerpts for the Italian Guidelines on CO2 monitoring translated using Google Translate from:
CO2 monitoring for prevention and management in indoor environments in relation to the transmission of the infection by SARS-CoV-2 virus.
To deal with the spread of the SARS-CoV-2 virus and its variants, in many different environments indoor, the Istituto Superiore di Sanità (ISS) has provided a series of indications and recommendations: the objective is the optimization of external air exchanges naturally or with mechanical systems and, more generally, of ventilation. The recommended approach is not based on single stand-alone actions, but on a set of actions which must work simultaneously and in a complementary way to be effective in reduction of the risk and which must be part of the organic risk prevention and mitigation strategy.
Attention to indoor air quality has always been a real strong point for promoting and
safeguard the health of citizens and at this moment it is even more so, considering that, at present currently, most infections from SARS-CoV-2 and its variants occur in environments and spaces indoors.
Several nations have introduced ad hoc regulations relating to concentrations in their legislation
CO2 in which precise indications are given on the concentration values and related times
measurement which have proven extremely useful in the management of environments/spaces.
About that in the ISTISAN Report “Presence of CO2 and H2S in indoor environments: current knowledge and literature scientific on the subject", a general examination of the main indications developed at the level is reported
European and international.
The ISTISAN Report recommends using it in evaluations a maximum CO2 concentration of 1000 ppmv which represents a reference/guide for various countries of the EU and non-EU, "a first management approach" in the quality awareness process of indoor air not strictly linked to health problems (health effects occur at significantly higher concentration levels); a value approximately 600 ppmv higher than to the average value of CO2 in ambient-outdoor air which is between 400 and 500 ppmv (with hourly variations and daily which are affected by the season and can even be higher than 150 ppmv).
To read more about the Italian guidelines click on this link: https://www.iss.it/documents/20126/6703853/NT_co2_DEF.pdf/
