Thanks to its structure and location, Smíchovská střední průmyslová škola (SSPŠ) was chosen as ideal for testing in difficult conditions of urban development and dense road traffic. "Sensors were installed in ten classes to permanently measure indoor air pollution levels through atmospheric carbon dioxide (CO2), relative humidity and temperature values, and transmit these data 24 hours a day to the O2 internal system," says Petr Hájek, expert from O2. At the same time, two sensors were installed at the school to measure the level of air pollution through dust particles, and in some places outside the school windows, the noise level was also measured.
http://www.denik.cz/z_domova/deti-jsou-ve-skole-otravene-staci-pry-vyvetrat-20170615.html
