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Order of appearence	Full citation	SRCosmos Link
1	Assimakopoulos VD, Helmis CG, (2004). ‘On the study of a sick building - The case of the Athens Air Traffic Control Tower’. Energy and Buildings, 36 (1), pp.15-22.
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Keywords	indoor air quality, experimental measurements, TVOCs, particulates
Abstract	The closure of natural openings of buildings for energy saving purposes, the use of untested new materials as well as the poor air exchange drastically affect indoor air quality. A result of this interference is the increase in the concentration of many pollutants such as PM10, PM2.5, TVOCs and many others, which may eventually lead to sick-building syndrome. A great portion of these pollutants originates from the outdoor air and enters the indoor environment via ventilation systems, physical openings and cracks. Furthermore, smoking, bad cleaning habits and poor maintenance of the ventilation system filters largely contribute to further increase of their concentration. Within that frame, the purpose of this work is to present an experimental study of indoor air quality regarding PM10, PM2.5, TTVOCs and CO2 in selected rooms of the Athens Traffic Control Tower (ATCT) buildings in Hellinicon (old) and Spata (new) international airport. The Hellinicon ATCT building complex is located southerly of the city of Athens, close to the old international airport at Hellinicon and is mechanically ventilated by a Heating-Ventilating and Air-Conditioning (HVAC) system, which operates at a high recirculation rate. The Spata ATCT is located in the new Athens International Airport area, which was a rural area prior to the construction of the new airport. The building is mechanically ventilated by three different air handling units at a very low recirculation rate. Both experimental campaigns took place in two separate cycles, the first one aimed at identifying and comparing the indoor air quality status in differently used rooms and the second one aimed at investigating the effectiveness of certain measures implemented. All experimental campaigns included daily spot measurements of TTVOCs and CO2 including various positions in each room, the air intake diffusers and the plenum. Furthermore, during all experimental days, 24hour measurements of PM10 and PM2.5 were taken at specified locations inside the selected areas. Finally, spot measurements of TTVOCs and CO2 were taken in the outdoor environment very close to the outdoor air intakes. Indoor air quality in the two ATCT’s presented different characteristics owing to the different ventilation types selected. Thus, in the Hellinicon ATCT pollutants concentration levels depend on indoor sources such as smoking, materials emissions and the number of people present in the rooms, while in the Spata ATCT, it depends mostly on outdoor levels except for particulates.
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Name	Affiliation	Home page	e-mail	Total pubs
Assimakopoulos VD	Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa & V. Pavlou str., 15236 Athens, Greece.		vasiliki@meteo.noa.gr	14
Helmis CG	Department of Environmental Physics and Meteorology, Faculty of Physics, University of Athens, Building Phys 5, University Campus, 157 84 Athens, Greece	Building Phys 5, University Campus, 157 84 Athens, Greece	chelmis@phys.uoa.gr	22
Stathopoulou O				1