{"id":70991,"date":"2025-09-10T15:54:34","date_gmt":"2025-09-10T13:54:34","guid":{"rendered":"https:\/\/www.jvd.fr\/?p=70991"},"modified":"2025-12-22T10:32:58","modified_gmt":"2025-12-22T09:32:58","slug":"key-figures-on-indoor-air-quality","status":"publish","type":"post","link":"https:\/\/www.jvd.fr\/en\/key-figures-on-indoor-air-quality\/","title":{"rendered":"Key figures on indoor air quality"},"content":{"rendered":"\n

Indoor air quality is a broad field of expertise, and many figures circulate online on this topic. Whether you are a journalist, a scientist, or simply curious to learn more about the air you breathe, JVD presents a selection of key figures on indoor air quality (IAQ)<\/strong>.<\/p>\n\n\n\n

Concentration-related IAQ figures<\/h2>\n\n\n\n

Indoor air is up to 10 times more polluted than outdoor air<\/strong>, according to OQAI<\/strong>.<\/p>\n\n\n\n

In total, there are more than 5,000 pollutants in indoor air<\/strong>, according to Isabella Annesi-Maesano<\/strong>, Professor of Environmental Epidemiology.<\/p>\n\n\n\n

A European standard<\/strong> defines the ideal indoor humidity level<\/strong> in homes as being between 30% and 70%<\/strong>. However, French medical professionals recommend a narrower guideline range of 40% to 60%<\/strong>.<\/p>\n\n\n\n

Health-related IAQ figures<\/h2>\n\n\n\n

One in three people is allergic in France in 2023<\/strong>, according to the WHO<\/strong>, and this figure is expected to rise to one in two by 2050<\/strong>.<\/p>\n\n\n\n

More than three out of four children in France breathe air that negatively impacts their health<\/strong>, according to UNICEF<\/strong>.<\/p>\n\n\n\n

There is a 12-fold lower risk of coronavirus transmission<\/strong> in a classroom equipped with an air purifier<\/strong>, according to a project led by engineer Bert Blocken<\/strong> (KU Leuven \/ TU Eindhoven), virologist Marc Van Ranst<\/strong> (KU Leuven), and Leen Peeters<\/strong> (Th!nk E).<\/p>\n\n\n\n

According to Dr. Laurent Nicod<\/strong>, Head of the Pulmonology Department at the Lausanne University Hospital (Switzerland)<\/strong>, \u201cliving within 50 meters of a major road increases the risk of developing asthma by 180%.\u201d<\/em><\/p>\n\n\n\n

Healthcare-associated infections<\/strong> account for approximately 750,000 infections per year<\/strong> and are the direct cause of 4,000 deaths annually in France<\/strong>, according to INSERM<\/strong>.<\/p>\n\n\n\n

Each year in France, nearly 40,000 deaths<\/strong> among people aged 30 and over are attributed to exposure to fine particles (PM2.5)<\/strong>, according to Sant\u00e9 Publique France<\/strong>.<\/p>\n\n\n\n

In 2019, air pollution caused approximately 9 million premature deaths worldwide<\/strong>, according to The Lancet Planetary Health<\/strong>.<\/p>\n\n\n\n

Behavioral IAQ figures<\/h2>\n\n\n\n

80% of our time is spent indoors<\/strong>, according to the French Ministry for Ecological Transition<\/strong>.<\/p>\n\n\n\n

An average person breathes approximately 15,000 liters of air per day<\/strong>, according to Recosant\u00e9<\/strong>.<\/p>\n\n\n\n

According to the Canadian Lung Association<\/strong>, an average adult breathes more than 900 times per hour<\/strong>.<\/p>\n\n\n\n

On average, 16% of hotel guests complain about unpleasant odors<\/strong>, according to Coach Omnium<\/strong>.<\/p>\n\n\n\n

Whenever possible, windows should be opened for at least 5 to 10 minutes per day<\/strong> to maintain CO\u2082 levels below 800 ppm<\/strong>, which corresponds to recommended threshold values for frequently occupied spaces (meeting rooms, open spaces).<\/p>\n\n\n\n

HEPA air purifiers<\/strong> can improve productivity by up to 11%<\/strong> in indoor environments, thanks to their positive impact on air quality, according to the French Ministry of Solidarity and Health<\/strong>.<\/p>\n\n\n\n

Short-term sick leave decreases by 10%<\/strong> when indoor air pollutants are reduced by half in workplaces, according to a REHVA study<\/strong>.<\/p>\n\n\n\n

The cost of absenteeism linked to poor indoor air quality<\/strong> is estimated at \u20ac450 per employee per year<\/strong>, according to the Harvard School of Public Health<\/strong>.<\/p>\n\n\n\n

The cost of urban air pollution<\/strong> is estimated at \u20ac1,200 per inhabitant per year<\/strong> in the metropolitan areas of Lyon and Grenoble<\/strong>, according to INSERM<\/strong> and CNRS<\/strong>.<\/p>\n\n\n\n

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Contact a JVD advisor<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Indoor air quality is a broad field of expertise, and many figures circulate online on this topic. Whether you are a journalist, a scientist, or simply curious to learn more about the air you breathe, JVD presents a selection of key figures on indoor air quality (IAQ). Concentration-related IAQ figures Indoor air is up to […]<\/p>\n","protected":false},"author":13,"featured_media":3157,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","_searchwp_excluded":"","inline_featured_image":false,"footnotes":""},"categories":[1585],"class_list":["post-70991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-purifiers"],"acf":[],"yoast_head":"\nKey figures on indoor air quality - JVD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jvd.fr\/en\/key-figures-on-indoor-air-quality\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Key figures on indoor air quality - JVD\" \/>\n<meta property=\"og:description\" content=\"Indoor air quality is a broad field of expertise, and many figures circulate online on this topic. 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