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Air quality measured in a classroom served by roof mounted natural ventilation windcatchers

JONES, B; Kirby, R; Kolokotroni, M; Payne, T; (2007) Air quality measured in a classroom served by roof mounted natural ventilation windcatchers. In: Santamouris, M and Wouters, P, (eds.) Proceedings of the 2nd PALENC Conference and 28th AIVC Conference on Building Low Energy Cooling and Advanced Ventilation Technologies in the 21st Century, September 2007, Crete island, Greece. Heliotopos Conferences Limited: Athens, Greece. Green open access

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Abstract

This study examines air quality measured in two classrooms in a UK school, which uses two different forms of natural ventilation, over an eight month period. The first classroom is an internal room that contains a top-down natural ventilation system known as a “Windcatcher”. The room also has a separate mechanical extract fan. The second classroom is ventilated using windows and doors that open to the outside. This study focuses on measuring the performance of a Windcatcher and reviews its potential to replace ventilation provided by conventional windows. Potential benefits of Windcatchers include the ability to provide night cooling without posing a security risks, and daytime ventilation without relying upon opening windows. The study will examine Windcatcher performance in terms of air quality delivered in the first room, and then compare results with measurements obtained for a room that uses conventional opening windows. The study will also review the effectiveness of Windcatchers in meeting the regulatory standards for naturally ventilated classrooms, as set out by the UK Government. The air quality measurements reported demonstrate that the classroom utilising a Windcatcher was able to meet the UK Government standards for carbon dioxide and temperature, while the classroom relying solely on windows failed to meet the carbon dioxide requirements. Furthermore, the study demonstrates that Windcatchers provide significant night cooling and increase air exchange rates. Windcatchers do, therefore, have a significant role to play in meeting ventilation requirements in schools.

Type: Proceedings paper
Title: Air quality measured in a classroom served by roof mounted natural ventilation windcatchers
ISBN-13: 9789606746024
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.aivc.org/frameset/frameset.html?../Conf...
Language: English
Keywords: natural ventilation, schools, windcatcher, wind-catcher, ventilation rate, measurements, indoor air quality
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
URI: https://discovery.ucl.ac.uk/id/eprint/1316633
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