Measurement and rapid assessment of indoor air quality at mass gathering events to assess ventilation performance and reduce aerosol transmission of SARS-CoV-2
To assess risk factors for COVID-19 transmission and address the closure of mass gathering events since March 2020, the UK Government ran the Events Research Programme (ERP), following which it reopened live events in sports, music, and culture in July 2021. We report the rapid post-occupancy evaluation of Indoor Air Quality (IAQ) and associated long-range airborne transmission risk conducted in the Environmental Study of the ERP. Ten large venues around the UK were monitored with CO2 sensors at a high spatial and temporal resolution during 90 events. An IAQ Index based on CO2 concentration was developed, and all monitored spaces were classified in bands from A to G based on their average and maximum CO2 concentrations from all events. High resolution monitoring and the IAQ Index depicted the overall state of ventilation at live events, and allowed identification of issues with ventilation effectiveness and distribution, and of spaces with poor ventilation and the settings in which long-range airborne transmission risk may be increased. In numerous settings, CO2 levels were found to follow patterns relating to event management and specific occupancy of spaces around the venues. Good ventilation was observed in 90% of spaces monitored for given occupancies.
Funding
Airborne Infection Reduction through Building Operation and Design for SARS-CoV-2 (AIRBODS)
UK Research and Innovation
Find out more...Department for Digital, Culture, Media and Sports
History
School
- Architecture, Building and Civil Engineering
Published in
Building Services Engineering Research and TechnologyVolume
44Issue
2Pages
113 - 133Publisher
SAGE PublicationsVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).Acceptance date
2022-10-25Publication date
2022-12-16Copyright date
2022ISSN
0143-6244eISSN
1477-0849Publisher version
Language
- en