John Libbey Eurotext

Environnement, Risques & Santé


Identification of effective ventilation strategies to reduce the risk of COVID-19 infections inside buildings, using the INDALO® digital multizone model Volume 21, issue 6, November-December 2022


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1 Octopus Lab 237, rue du Ballon 59110 La Madeleine, France <> <> <> <>
2 Laboratoire image, ville, environnement (LIVE) UMR 7362 du CNRS et de l’Université de Strasbourg 3, rue de l’Argonne 67000 Strasbourg, France
3 Agence française de la transition énergétique (ADEME) 20, avenue du Grésillé 49000 Angers, France
4 Service d’hygiène hospitalière Centre hospitalier universitaire (CHU) 5, rue du Professeur Yves Boquien 44093 Nantes, France <>
5 Haut Conseil de la santé publique (HCSP) 10, place des Cinq-Martyrsdu-Lycée-Buffon Paris, France <>
6 Institut de physique du globe de Paris (IPGP) – CNRS – Université Paris Cité 1, rue Jussieu 75005 Paris, France
* Tirés à part : M. Mendez

Faced with epidemic risks, ensuring an exchange of air and sufficient direction of airflow is essential to reduce the air-borne transmission of infectious agents in buildings. In this study, we strove to identify effective ventilation strategies to reduce the risk of infection by COVID-19 inside buildings. To do so, we developed a multi-route transmission model of SARS-CoV-2 (INDALO®-COVID) which estimates a risk of infection.

This study enabled us to quantify the impact of two preventive measures (installation of a mobile air purifier and increase in the renewal of air by the air purification unit) on the risk of COVID-19 infection in a nursing home. In the configuration used in this study, the use of an air purifier in the rooms of residents with COVID-19 appears to be the most effective measure to reduce the viral load potentially transported to other areas of the building, and thus to reduce the risk of COVID-19 infection among all residents.

The digital model developed is a versatile and ready-to-use solution, which can compare preventive measures and design/renovation choices for different types of buildings and uses.