--- title: Key figures on indoor air quality description: Indoor air quality (IAQ) is a vast area of expertise, and numerous figures circulate on the internet about it. image: https://news.jvd.fr/hubfs/S.BLEU.SALON.jpg --- Mar 27, 2023 12:13:59 PM # Key figures on indoor air quality [ Pierre Alexandre Deveau ](https://news.jvd.fr/en-gb/author/pierre-alexandre) Partager sur les réseaux : [facebook-f icon ](http://www.facebook.com/share.php?u=https://news.jvd.fr/en-gb/air/key-figures-iaq) [linkedin-in icon ](http://www.linkedin.com/shareArticle?mini=true&url=https://news.jvd.fr/en-gb/air/key-figures-iaq) [Twitter icon ](https://twitter.com/intent/tweet?url=https://news.jvd.fr/en-gb/air/key-figures-iaq) [envelope icon ](mailto:?body=https://news.jvd.fr/en-gb/air/key-figures-iaq) [![JVD Shield air purifiers improve indoor air quality](https://news.jvd.fr/hs-fs/hubfs/S.BLEU.SALON.jpg?width=960&height=657&name=S.BLEU.SALON.jpg)](https://www.jvd.fr/en/air-purifier/) Indoor air quality is a vast area of expertise, and numerous figures circulate on the internet about it. Whether you are a journalist, scientist, or simply curious to learn more about the air you breathe, JVD presents today a compilation of key figures related to indoor air quality (IAQ).   IAQ concentration figures - Indoor air is 10 times more polluted than outdoor air, according to [OQAI](http://oqai.fr/en/pages/qui-sommes-nous). - There are more than 5,000 pollutants in indoor air, according to [Isabella Annesi-Maesano](https://www.linkedin.com/in/isabella-annesi-maesano-1093b259/), a professor of environmental epidemiology. - [A European standard](https://www.boutique.afnor.org/en-gb/standard/nf-en-13779/ventilation-for-nonresidential-buildings-performance-requirements-for-venti/fa137895/857) establishes the ideal humidity level in the air of a dwelling between 30 and 70%, but French doctors have agreed to tighten this guideline value to between 40 and 60%.   IAQ health figures - **[![Allergic seizures are reduced by the beneficial effects of Shield and Shield Compact air purifiers](https://news.jvd.fr/hs-fs/hubfs/image-allergie.jpg?width=417&height=278&name=image-allergie.jpg)](https://www.jvd.fr/en/air-purifier/shield/#performances)** One in three people is allergic in France in 2023, according to the [WHO](https://www.who.int/news-room/fact-sheets/detail/asthma), and soon one in two by 2050. - More than three out of four children breathe air that negatively impacts their health in France, according to [UNICEF](https://www.unicef.fr/article/en-france-3-enfants-sur-4-respirent-un-air-pollue/). - There are 12 times fewer risks of coronavirus contamination in a classroom equipped with an air purifier, according to a project led by engineer [Bert Blocken](https://research.tue.nl/en/persons/bert-je-blocken) (KU Leuven/TU Eindhoven), virologist [Marc Van Ranst](https://www.kuleuven.be/wieiswie/en/person/00015875) (KU Leuven), and [Leen Peeters](https://www.linkedin.com/in/leen-peeters-2025201a/?originalSubdomain=be) (Th! Nk E). - Living within 50 meters of a road axis increases the risk of developing asthma by 180%, according to [Dr. Laurent Nicod](https://www.hirslanden.ch/en/corporate/doctors/3/professeur-laurent-nicod.html), head of the pulmonology department at the University Hospital of Vaud (Switzerland). - Nosocomial infections represent approximately 750,000 infections per year and would be the direct cause of 4,000 deaths in France, according to [INSERM](https://www.inserm.fr/dossier/infections-nosocomiales/#:~:text=Un%20patient%20sur%20vingt%20est%20concern%C3%A9&text=Cela%20repr%C3%A9sente%20environ%20750%20000,sont%20par%20exemple%20tr%C3%A8s%20concern%C3%A9s.). - Each year in France, nearly 40,000 deaths are attributable to exposure of people aged 30 and over to fine particles (PM2.5), according to [Santé Publique France](https://www.santepubliquefrance.fr/presse/2021/pollution-de-l-air-ambiant-nouvelles-estimations-de-son-impact-sur-la-sante-des-francais). - In 2019, air pollution caused approximately 9 million premature deaths worldwide, according to [The Lancet Planetary Health.](https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(22)00090-0/fulltext)    IAQ behavioral figures - 80% of our time is spent indoors, according to the [Ministry of Ecological Transition](https://www.ecologie.gouv.fr/qualite-lair-interieur). - On average, 15,000 liters of air are breathed per day per person, according to [Recosanté](https://recosante.beta.gouv.fr/articles/comment-adapter-sa-pratique-sportive-selon-la-qualite-de-l-air). - According to the [Canadian Lung Association](https://www.lung.ca/lung-health/lung-info/breathing?_ga=2.99492825.636264820.1681378782-1673451654.1681378782), the average adult breathes more than 900 times per hour. - On average, 16% of hotel guests complain about unpleasant odors in these establishments, according to [Coach Omnium](https://coachomnium.com/bonus/statistiques/). [![Key figures on indoor air quality](https://news.jvd.fr/hs-fs/hubfs/Chiffres%20QAI%20en.jpg?width=465&height=392&name=Chiffres%20QAI%20en.jpg)](https://www.jvd.fr/en/air-purifier/shield/#outils) - If possible, open windows in your premises for at least 5 to 10 minutes a day to achieve CO2 levels below 800ppm ([recommended threshold value](https://nousaerons.fr/aero-score/index_UK.html)) for a frequented space (meeting room, open spaces).  - [HEPA air purifiers](https://www.jvd.fr/en/air-purifier/) can improve productivity by up to 11% in an indoor space thanks to their beneficial effects on air quality, according to the [Ministry of Solidarity and Health](https://sante.gouv.fr/sante-et-environnement/batiments/article/qualite-de-l-air-interieur).   - Short-term sick leave decreases by 10% when indoor air pollutants are reduced by half in workspaces, according to a [study by REHVA](https://www.rehva.eu/eshop/preview?tx_cartbooks_preview%5Bbook%5D=5&cHash=da39e55cf2e97dc13ea47a288406328e).   - The cost of absenteeism due to poor indoor air quality is estimated at €450 per year per employee, according to the [Harvard School of Public Health](https://www.hsph.harvard.edu/faculty-research/). - The cost of urban pollution is €1,200 per inhabitant per year in the Lyon and Grenoble agglomerations, according to [INSERM and CNRS](https://presse.inserm.fr/en/better-air-quality-what-should-the-target-values-be-for-improving-health/59076/).   [Air purifier](https://news.jvd.fr/en-gb/tag/air-purifier) ## Laissez un commentaire ## Ces articles peuvent vous plairent... 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