Ocjenjivanje kvalitete unutarnjeg zraka u garsonijeri na temelju koncentracija ugljikovog dioksida i čestica u zraku = Indoor air quality assessment in one-bedroom apartment based on carbon dioxide and particulate matter concentrations
Kovač, Bruno ; Vaupotič, Janja ; Dovjak, Mateja
According to the World Health Organization, indoor air quality (IAQ) is the most critical health risk factor in living environments such as residential buildings. It is influenced by numerous ...parameters related to location (outdoor air quality, meteorology), building characteristics, ventilation efficiency, indoor materials and occupant behaviour. Current studies on IAQ in residential buildings highlight the problem of increased carbon dioxide (CO2) concentrations in bedrooms due to inefficient ventilation, especially at night (up to 2000 ppm). Considering this, CO2 is recognised as a primary indicator of IAQ. However, examining CO2 concentration alongside other indoor air pollutants, meteorological parameters, and ventilation efficiency provides valuable insights into their mutual dependence and daily dynamics. Our research aims to determine the IAQ in a naturally ventilated one-bedroom apartment in Ljubljana (net surface area 23 m2). In indoor air, cont inuous measurements of CO2 and particulate matter (PM2.5) concentrations (CCO2, CPM2.5), and the meteorological parameters (temperature and relative air humidity) were performed, and user activities (ventilation frequency and duration) were recorded; for the period January 5‒February 5, 2024. Outdoor temperature data (Tout) were obtained from the nearest meteorological station of the Slovenian Environment Agency (ARSO). IAQ was assessed for the occupancy period regarding the categories of indoor environmental quality (I‒IV IEQ) defined by SIST EN 16798–1: 2019. For the period without ventilation, the average CCO2 was 1171±323 ppm, which corresponds to category III IEQ (920 - 1220 ppm), and the average CPM2.5 was 32±6 µgm–3. For the period with ventilation, the average CCO2 was 691±266 ppm, which corresponds to category I IEQ (<770 ppm), and the average CPM2.5 was 32±8 µgm–3. In conclusion, environmental health recommendations for adequate ventilation considering occu pant activity and outdoor air quality are defined.
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