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Correction published on 25 October 2018, see Atmosphere 2018, 9(11), 417.
Open AccessArticle

Indoor Air Quality and Thermal Conditions in a Primary School with a Green Roof System

1
Department of Applied Physics, Faculty of Physics, University of Athens, Building Physics 5, University Campus, 157 84 Athens, Greece
2
Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Koufou, 152 36 Athens, Greece
*
Author to whom correspondence should be addressed.
Atmosphere 2018, 9(2), 75; https://doi.org/10.3390/atmos9020075
Received: 30 November 2017 / Revised: 16 February 2018 / Accepted: 17 February 2018 / Published: 20 February 2018
(This article belongs to the Special Issue Advances in Atmospheric Physics: Selected Papers from CEST2017)
This paper presents experimental results from a typical school building in Athens, equipped partly with a green roof system (GRS). Environmental monitoring took place in six classrooms located both under the concrete roof and the GRS sectors as well as in the immediate external environment during the warm and cold periods of a school year. Daily measurements of pollutants CO2, TVOCs (Total Volatile Organic Compound), PM1, PM2.5, and PM10 were performed in selected classes. Moreover, indoor ambient temperature (T) and relative humidity (RH) measurements were implemented in order to estimate the absolute humidity (AH) and assess the indoor environmental conditions. The results highlight that during summer, the GRS reduces temperature in a classroom on the top floor by about 2.8 °C, in comparison with the respective classroom under the concrete roof and that AH remained relatively stable for both classrooms. Amid winter, a reverse behavior occurs only for temperature. Moreover, air exchange rates (AER) were calculated by using the CO2 decay method for all of the classrooms. The results demonstrated insufficient ventilation for all experimental sights. Finally, concentrations of PM1, PM2.5 and PM10, were found to be relatively decreased, with average values of 0.79, 3.39, and 27.80 μg m−3. Levels of CO2 and TVOCs were elevated during class hours ranging from 469 to 779 ppm and from 6.63 ppm to 13.33 ppm, respectively, but generally within the respective limits of exposure. The examination of the indoor/outdoor (I/O) ratio of air pollutants, demonstrated that the outdoor meteorology affects only PM1 and PM2.5, as PM10 and TVOCs are strongly affected by internal sources and the activities of pupils. View Full-Text
Keywords: indoor air quality; thermal conditions; school building microenvironment; green roof; air pollutants indoor air quality; thermal conditions; school building microenvironment; green roof; air pollutants
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MDPI and ACS Style

Barmparesos, N.; Assimakopoulos, M.N.; Assimakopoulos, V.D.; Loumos, N.; Sotiriou, M.A.; Koukoumtzis, A. Indoor Air Quality and Thermal Conditions in a Primary School with a Green Roof System. Atmosphere 2018, 9, 75. https://doi.org/10.3390/atmos9020075

AMA Style

Barmparesos N, Assimakopoulos MN, Assimakopoulos VD, Loumos N, Sotiriou MA, Koukoumtzis A. Indoor Air Quality and Thermal Conditions in a Primary School with a Green Roof System. Atmosphere. 2018; 9(2):75. https://doi.org/10.3390/atmos9020075

Chicago/Turabian Style

Barmparesos, Nikolaos; Assimakopoulos, Margarita N.; Assimakopoulos, Vasiliki D.; Loumos, Nikolaos; Sotiriou, Maria Aliki; Koukoumtzis, Athanasios. 2018. "Indoor Air Quality and Thermal Conditions in a Primary School with a Green Roof System" Atmosphere 9, no. 2: 75. https://doi.org/10.3390/atmos9020075

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