Abstract
Delhi ranks highest among the most polluted city in the world in terms of air pollution. Its health impact may include diseases like asthma, lung cancer, COPD, increased long-term risk of cardiopulmonary mortality. Degraded indoor air quality inside commercial buildings such as offices may affect the health of the workers and can indirectly affect their productivity. In the present study, indoor air quality has been studied in four different air-conditioned office buildings located in Delhi NCR for the criteria pollutant PM2.5 and the CO2 as ventilation parameter. The total hazard ratio indicator has also been calculated from the data of PM2.5 and CO2 for all selected office premises. The results of the study show the highest concentration of PM2.5 in building A1 (116.5 ± 67 µg/m3) and highest CO2 concentration in building A2 (1600 + 30.5 ppm). Higher concentration of PM2.5 in building A1 could be due to its maximum proximity to urban busy roads and poorly maintained HVAC ducting system, which may lead to infiltration and more leakages of PM2.5 from outdoors. Similarly, the highest concentration of CO2 in building A2 could be due to insufficient ventilation condition. In each studied building, the concentration of CO2 and PM2.5 are recorded to be higher than the NAAQS and ASHRAE standards. The health hazard ratio indicates that both CO2 and PM2.5 plays an important role in determining the health of the building and its occupants. However, the health impacts of increased PM2.5 could be more severe than CO2 depending upon the sources of PM2.5.
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Gupta, A., Goyal, R., Kulshreshtha, P., Jain, A. (2020). Environmental Monitoring of PM2.5 and CO2 in Indoor Office Spaces of Delhi, India. In: Sharma, A., Goyal, R., Mittal, R. (eds) Indoor Environmental Quality. Lecture Notes in Civil Engineering, vol 60. Springer, Singapore. https://doi.org/10.1007/978-981-15-1334-3_8
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