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

Author

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  • Piotr Lis

    (Faculty of Infrastructure and Environment, Czestochowa University of Technology, J.H. Dąbrowskiego 73, 42-201 Czestochowa, Poland)

  • Anna Lis

    (Faculty of Civil Engineering, Czestochowa University of Technology, Akademicka 3, 42-200 Czestochowa, Poland)

Abstract

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 3 /(h m daPa 2/3 ) ( q 100KL = 32.4912 m 3 /(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 3 /(m h daPa 2/3 )) 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.

Suggested Citation

  • Piotr Lis & Anna Lis, 2021. "The Required Amount of Ventilation Air for the Classroom and the Possibility of Air Infiltration through the Windows," Energies, MDPI, vol. 14(22), pages 1-22, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7537-:d:676872
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    References listed on IDEAS

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    1. Perez, Yael Valerie & Capeluto, Isaac Guedi, 2009. "Climatic considerations in school building design in the hot-humid climate for reducing energy consumption," Applied Energy, Elsevier, vol. 86(3), pages 340-348, March.
    2. Snezana Bogdanovica & Jurgis Zemitis & Raimonds Bogdanovics, 2020. "The Effect of CO 2 Concentration on Children’s Well-Being during the Process of Learning," Energies, MDPI, vol. 13(22), pages 1-14, November.
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    Cited by:

    1. Sungwan Son & Aya Elkamhawy & Choon-Man Jang, 2022. "Active Soil Filter System for Indoor Air Purification in School Classrooms," IJERPH, MDPI, vol. 19(23), pages 1-16, November.

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