The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows

The majority of education buildings in Poland are equipped with natural (gravity) ventilation, where the air inflow depends on the level of window airtightness. A complete statistical urban population of 50 school buildings in Czestochowa have been examined. The main issue to be clarified is the ans...

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Autores principales:	Piotr Lis, Anna Lis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	educational building classroom window air-tightness air infiltration natural ventilation Technology T
Acceso en línea:	https://doaj.org/article/6cebea9684a3486587559678acfb0987
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spelling	oai:doaj.org-article:6cebea9684a3486587559678acfb09872021-11-25T17:26:22ZThe Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows10.3390/en142275371996-1073https://doaj.org/article/6cebea9684a3486587559678acfb09872021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7537https://doaj.org/toc/1996-1073The majority of education buildings in Poland are equipped with natural (gravity) ventilation, where the air inflow depends on the level of window airtightness. A complete statistical urban population of 50 school buildings in Czestochowa have been examined. The main issue to be clarified is the answer to the following questions: Is it theoretically possible to supply enough air to meet the ventilation requirements with gravity ventilation? What is the airtightness of the windows at which it will be possible? The average technical conditions of windows in the analysed buildings were bad. However, only in the case in which high external air leakage coefficient a = 7.0 m<sup>3</sup>/(h m daPa<sup>2/3</sup>) (<i>q<sub>100KL</sub></i> = 32.4912 m<sup>3</sup>/(h m) is the amount of air passing through the leaks similar to the quantitative ventilation requirements for classrooms. The quantity of air flowing from the outside through modernized windows that meet the technical requirements (a = 0.6 to 1.0 m<sup>3</sup>/(m h daPa<sup>2/3</sup>)) covers on average only about 12% and about 21% of the ventilation needs. Without installing additional vents in the rooms, or better yet, installing mechanical ventilation with heat recovery, meeting the ventilation norm requirements will be impossible.Piotr LisAnna LisMDPI AGarticleeducational buildingclassroomwindow air-tightnessair infiltrationnatural ventilationTechnologyTENEnergies, Vol 14, Iss 7537, p 7537 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	educational building classroom window air-tightness air infiltration natural ventilation Technology T
spellingShingle	educational building classroom window air-tightness air infiltration natural ventilation Technology T Piotr Lis Anna Lis The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
description	The majority of education buildings in Poland are equipped with natural (gravity) ventilation, where the air inflow depends on the level of window airtightness. A complete statistical urban population of 50 school buildings in Czestochowa have been examined. The main issue to be clarified is the answer to the following questions: Is it theoretically possible to supply enough air to meet the ventilation requirements with gravity ventilation? What is the airtightness of the windows at which it will be possible? The average technical conditions of windows in the analysed buildings were bad. However, only in the case in which high external air leakage coefficient a = 7.0 m<sup>3</sup>/(h m daPa<sup>2/3</sup>) (<i>q<sub>100KL</sub></i> = 32.4912 m<sup>3</sup>/(h m) is the amount of air passing through the leaks similar to the quantitative ventilation requirements for classrooms. The quantity of air flowing from the outside through modernized windows that meet the technical requirements (a = 0.6 to 1.0 m<sup>3</sup>/(m h daPa<sup>2/3</sup>)) covers on average only about 12% and about 21% of the ventilation needs. Without installing additional vents in the rooms, or better yet, installing mechanical ventilation with heat recovery, meeting the ventilation norm requirements will be impossible.
format	article
author	Piotr Lis Anna Lis
author_facet	Piotr Lis Anna Lis
author_sort	Piotr Lis
title	The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
title_short	The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
title_full	The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
title_fullStr	The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
title_full_unstemmed	The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows
title_sort	required amount of ventilation air for the classroom and the possibility of air infiltration through the windows
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6cebea9684a3486587559678acfb0987
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The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows

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