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Atmosphere 2015, 6(11), 1652-1675; doi:10.3390/atmos6111652

Indoor Air Quality in Naturally Ventilated Italian Classrooms

1
Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino (FR) 03043, Italy
2
International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane (QLD) 4001, Australia
3
Center of Health Sciences and Sport, Santa Catarina State University, Florianopolis 88080-350, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Pasquale Avino
Received: 22 September 2015 / Revised: 24 October 2015 / Accepted: 27 October 2015 / Published: 2 November 2015
(This article belongs to the Special Issue Indoor and Outdoor Air Quality)
View Full-Text   |   Download PDF [652 KB, uploaded 2 November 2015]   |  

Abstract

Characterization of indoor air quality in school classrooms is crucial to children’s health and performance. The present study was undertaken to characterize the indoor air quality in six naturally ventilated classrooms of three schools in Cassino (Italy). Indoor particle number, mass, black carbon, CO2 and radon concentrations, as well as outdoor particle number were measured within school hours during the winter and spring season. The study found the concentrations of indoor particle number were influenced by the concentrations in the outdoors; highest BC values were detected in classrooms during peak traffic time. The effect of different seasons’ airing mode on the indoor air quality was also detected. The ratio between indoor and outdoor particles was of 0.85 ± 0.10 in winter, under airing conditions of short opening window periods, and 1.00 ± 0.15 in spring when the windows were opened for longer periods. This was associated to a higher degree of penetration of outdoor particles due to longer period of window opening. Lower CO2 levels were found in classrooms in spring (908 ppm) than in winter (2206 ppm). Additionally, a greater reduction in radon concentrations was found in spring. In addition, high PM10 levels were found in classrooms during break time due to re-suspension of coarse particles. View Full-Text
Keywords: classroom; Ni/Nout ratio; airing by opening windows; particle number concentration classroom; Ni/Nout ratio; airing by opening windows; particle number concentration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Fuoco, F.C.; Stabile, L.; Buonanno, G.; Trassiera, C.V.; Massimo, A.; Russi, A.; Mazaheri, M.; Morawska, L.; Andrade, A. Indoor Air Quality in Naturally Ventilated Italian Classrooms. Atmosphere 2015, 6, 1652-1675.

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