How to cite: Martonoş, I.M., Matei, A.T., Roșu, C. (2020) Ventilation and Indoor Air Quality in Learning Environments from Cluj-Napoca (Romania). 2020 ”Air and Water – Components of the Environment” Conference Proceedings, Cluj-Napoca, Romania, p. 23-36,
VENTILATION AND INDOOR AIR QUALITY IN LEARNING
ENVIRONMENTS FROM CLUJ-NAPOCA (ROMANIA)
Ildiko Melinda MARTONOŞ , Andrei TiberiuMATEI, Cristina ROȘU
ABSTRACT. – In today's modern society, people spend much of their time in closed spaces (at home, at work, at school etc.), the quality of the air inside these spaces being very important for the occupants' health. This study monitored the indoor air quality in classrooms, seminar and office rooms, within the Faculty of Environmental Science and Engineering from Cluj-Napoca and outside the building (the inner courtyard). Two air sampling campaigns were carried out, one during the cold period (March 2019), and the other during the warm period (April 2019). The monitored substances were: carbon dioxide (CO2), particulate matter (PM2.5, PM10), formaldehyde, total volatile organic compounds (TVOC) as well as the temperature and relative humidity of the studied rooms, respectively the outside courtyard, using BQ16 and BQ30 Trotec equipment’s. The average values for CO2 concentration exceeded the recommended 1,000 ppmv ASHRAE standard value, especially after a period when the rooms were not ventilated and the number of people inside increased. Concentrations of PM2.5 and PM10 were below the recommended ASHRAE standard value, of 25 μg/m3 for PM2.5 and 50 μg/m3 for PM10, so indoor air quality is not inappropriate for this reason. Formaldehyde and TVOC concentrations measured in the monitored rooms, did not exceeded the recommended standard values. Their concentrations were lower outside than inside, so it can be considered that their source was an internal one and their concentrations increased as the number of people in the room increases. In the seminar room the CDI (Chronic Daily Intake) value for formaldehyde has the value 0.052 mg/kg·day, slightly exceeding the recommended value by U.S.EPA (1989), of 0.045 mg/kg·day.
Keywords: indoor air quality, Cluj-Napoca, formaldehyde, particulate matter, CO2
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