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LET'S AIR

@nousaerons.bsky.social
3.8K followers 1K following 730 posts

News, scientific mediation and infographics on ventilation & indoor air quality. letsair.org

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LET'S AIR @nousaerons.bsky.social · 03/10/2026
Thanks.
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LET'S AIR @nousaerons.bsky.social · 01/10/2026
The CO2 level reading below shows that the room's mechanical ventilation system keeps the CO2 level around 800 ppm. This means a sensor measures the room's CO2 level in real time to instruct the ventilation system on how to refresh the indoor air.
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LET'S AIR @nousaerons.bsky.social · 30/09/2026
The importance of adequate indoor air renewal in public spaces has been known since the 19th century: in some theaters, fresh air is delivered to each spectator through vents located beneath the seats. Infographics on this subject are available at letsair.org.
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LET'S AIR @nousaerons.bsky.social · 28/09/2026
Unfortunately, we forgot our CO2 detector. Judging by the ventilation system, we think it’s excellent—though we’ll have to confirm that next time.
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LET'S AIR @nousaerons.bsky.social · 28/09/2026
In the grand auditorium of Maison de la Radio, Paris - France, ventilation is provided via vents located beneath each seat, delivering fresh air directly to the audience (yellow arrows). This is a well-known solution that ensures excellent indoor air renewal and comfort and reducing health risks.
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Reposted by LET'S AIR
LET'S AIR @nousaerons.bsky.social · 28/11/2025
We would like to remind you that our guide on airborne diseases and prevention methods is available in English, French, German, and Arabic at: letsair.org#mediation. It's the result of multidisciplinary work involving physicians, pulmonologists, aerosol scientists, engineers...
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LET'S AIR @nousaerons.bsky.social · 29/07/2026
Across the globe, wildfires also pose a public health challenge: how can good indoor air quality be ensured during a fire? www.asumag.com/energy/indoo...
asumag.com
Schools test indoor air quality strategies as wildfire smoke risks grow
The American Lung Association is urging K-12 schools to develop indoor air quality plans, while Boston University researchers are testing classroom-level strategies to help protect...
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LET'S AIR @nousaerons.bsky.social · 27/07/2026
The wind has shifted. See also the fire around Madrid.
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LET'S AIR @nousaerons.bsky.social · 26/07/2026
Nous n'avons pas testé leurs produits. Mais si ces derniers sont à l'image de la qualité du site, ils sont surement à envisager.
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LET'S AIR @nousaerons.bsky.social · 26/07/2026
Nous recommandons l'excellent site iqair.com bsky.app/profile/nous...
iqair.com
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LET'S AIR @nousaerons.bsky.social · 26/07/2026
Forest fires in France are affecting air quality across a large part of the country—see the figures on iqair.com. Masks and air purifiers should be deployed, particularly for the most vulnerable.
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LET'S AIR @nousaerons.bsky.social · 17/07/2026
Absolutely incredible work. Thank you for this tool @nukit.bsky.social
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LET'S AIR @nousaerons.bsky.social · 17/07/2026
Improving air quality and thermal comfort in schools: an architect's guide to heatwave resilience. As heatwaves become more frequent, architects are rethinking how schools can remain healthy, resilient, and operational. A paper from Royal Institute of British Architects. www.riba.org/work/insight...
riba.org
Improving air quality and thermal comfort in schools
As UK heatwaves become more frequent, architects are rethinking how schools can stay cool, maintain good indoor air quality and provide healthy learning environments. See what the latest guidance and ...
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LET'S AIR @nousaerons.bsky.social · 13/07/2026
It is worth noting that building a DIY model is an excellent educational tool for demonstrating that an air cleaner consists of a filter, a fan, and a power supply—and that this is all that is needed. It also serves as a reminder that noise is a factor to consider.
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LET'S AIR @nousaerons.bsky.social · 13/07/2026
A small disabled people's organisation in the UK called DAFT -Designing Accessible Futures Together- has build DIY Air Cleaners for community venues. They used our CardBox Air Cleaner tutorial and improved it. The new guide is available on: letsair.org/diy Excellent work!
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LET'S AIR @nousaerons.bsky.social · 10/07/2026
The figures are staggering: to tackle climate change, the French authorities must renovate some 400M m2 of public buildings. The bill could climb as high as €500B —according to the upper-end estimates of certain government sources. (a 2023 article) www.lemonde.fr/politique/ar...
lemonde.fr
Le « chantier du siècle » de la rénovation thermique des bâtiments publics en France
L’Etat et les collectivités locales doivent rénover pas moins de 400 millions de mètres carrés. Un enjeu écologique et énergétique, qui nécessite des financements pouvant atteindre jusqu’à 500 milliar...
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LET'S AIR @nousaerons.bsky.social · 25/06/2026
A new $500M fund is hoping to financially back the development of treatments that could protect people from many airborne viruses at once. It is also looking to support research into the adoption of technologies like air filtration. time.com/article/2026...
time.com
A New $500 Million Fund Is Trying to Eliminate the Common Cold
The project, called Intercept, aims to financially back the development of treatments that protect against respiratory infections of all kinds, plus technology to clean air.
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LET'S AIR @nousaerons.bsky.social · 22/06/2026
France is experiencing (very) hot weather; children are staying home, and some hospitals lack air conditioning. Indoor Environmental Quality is a critical issue that should guide a large number of public policies. When will dedicated structures be established to support the necessary changes?
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Reposted by LET'S AIR
Smart Air UK @smartairuk.bsky.social · 27/05/2026
More equipment heading out to schools as part of the Mayor’s School Filters Programme. Using timers to run air purifiers on a fixed school‑day schedule keeps air cleaning consistent, automatic and low‑effort for teachers 💨
Image shows timer switches being boxed up by Smart Air UK, as part of the Mayor of London's School Filters Programme providing air filters to 200 schools in London
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LET'S AIR @nousaerons.bsky.social · 26/05/2026
In French: “Architecture is also a matter of public health,” Eric Lengereau, director of the National School of Architecture of Nantes. - and this will increasingly be the case - www.lemoniteur.fr/vie-du-btp/g...
lemoniteur.fr
« L’architecture est aussi une affaire de santé publique », Eric Lengereau, directeur de l’Ecole nationale supérieure d’architecture de Nantes
Entretien avec Eric Lengereau, directeur de l’Ecole nationale supérieure d’architecture de Nantes.
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LET'S AIR @nousaerons.bsky.social · 19/05/2026
Oui, nous allons travailler à une version française intégrant les dernières mises à jour. La version anglophone est effectivement la plus avancée.
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LET'S AIR @nousaerons.bsky.social · 14/05/2026
Great explanation and very useful, thanks.
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LET'S AIR @nousaerons.bsky.social · 13/05/2026
The current outbreak of Andes virus (#Hantavirus) has led many experts (and others) to discuss aerosols. But what exactly is an aerosol? Below is our explanatory sheet from our booklet on airborne diseases, available at letsair.org/mediation
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LET'S AIR @nousaerons.bsky.social · 12/05/2026
Airborne transmission of the Andes virus (hantavirus) is being analyzed and further research is needed. To understand what airborne transmission is, the terminology, and the mechanisms involved, a 26-page booklet in PDF format can be downloaded at letsair.org/mediation
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LET'S AIR @nousaerons.bsky.social · 11/05/2026
Viruses, bacteria, contagiousness, vaccines… Find in our infographic information concerning diseases caused by airborne pathogens, including the Andes virus (hantavirus) .
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LET'S AIR @nousaerons.bsky.social · 11/05/2026
Infographic updated with the R0 value for the Andes Virus: 2.1 (based on a single publication). Thanks to those who brought this publication and value to our attention. It helps to keep in mind the relative magnitudes involved.
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LET'S AIR @nousaerons.bsky.social · 10/05/2026
Yes, it's done there :
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LET'S AIR @nousaerons.bsky.social · 10/05/2026
New version of our infographic on airborne diseases. We've added the Andes virus (hantavirus), which appears to be airborne. R0 is the degree of contagiousness: the higher the R0, the more contagious the disease. The R0 of Andes virus is not yet known, but it is certainly low.
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LET'S AIR @nousaerons.bsky.social · 08/05/2026
Illinois bill could require air quality monitors in classrooms. The bill states that school districts should ensure all active classrooms are equipped with air quality monitors. Advocates expect the state to spend $10 M to buy monitors for classrooms. www.wandtv.com/news/stateho...
wandtv.com
Illinois bill could require air quality monitors in classrooms
A plan moving in the Capitol could help improve the indoor air quality for Illinois schools.
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LET'S AIR @nousaerons.bsky.social · 27/03/2026
Minor update to our infographic on diseases transmitted through the air we breathe. Hope that helps.
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LET'S AIR @nousaerons.bsky.social · 25/03/2026
The latest version of our infographic on airborne diseases is now available as a PDF at letsair.org/mediation
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LET'S AIR @nousaerons.bsky.social · 25/03/2026
New version of our infographic on diseases transmitted through the air we breathe. Following several comments , we've repositioned vaccines between pathogens and diseases for greater clarity.
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LET'S AIR @nousaerons.bsky.social · 24/03/2026
Update of our infographic Sources : USA www.cdc.gov/vaccines/imz... France : www.ameli.fr/assure/sante...
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LET'S AIR @nousaerons.bsky.social · 23/03/2026
New version of our infographic on Diseases from pathogens than can be transmitted through the air we breath. We took into account proposals: change of colours, addition of Neisseria meningitidis and indication of vaccines recommended for children in the USA by the Centers for diseases control.
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LET'S AIR @nousaerons.bsky.social · 23/03/2026
You're right, we'll change that. Thanks.
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LET'S AIR @nousaerons.bsky.social · 18/03/2026
Shipment coming soon. This is Jaspair, our CO2 monitor for schools. More information at https//letsair.org/jaspair
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LET'S AIR @nousaerons.bsky.social · 13/03/2026
A first user guide for Jaspair, our CO2 monitor designed for schools, is now available at : letsair.org/jaspair/
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LET'S AIR @nousaerons.bsky.social · 11/03/2026
French people : nous recherchons des enseignants d'écoles maternelles ou primaires situées en Essonne pour tester Jaspair dans leurs classes. Merci de nous contacter sur jaspair@letsair.org
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LET'S AIR @nousaerons.bsky.social · 11/03/2026
Small-scale production of Jaspair, our CO2 monitor designed for schools, is underway. We will soon be contacting the schools where the initial tests will take place.
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LET'S AIR @nousaerons.bsky.social · 06/03/2026
During a lab at the @centralesupelec.bsky.social engineering school, Jaspair - our CO2 monitor - checks that the indoor air renewal remains good. The belly is green, the CO2 level is < 600 ppm, and the air-score is A. Everything is in order, and the students can work comfortably and safely.
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LET'S AIR @nousaerons.bsky.social · 04/03/2026
We have received the new printed circuit boards for JaspAir, our CO2 monitor designed for schools. We will now be able to launch production of 20 units, which will be delivered soon to the schools that will test our device. More info on Jaspair at letsair.org/jaspair
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LET'S AIR @nousaerons.bsky.social · 28/02/2026
Great tool, many thanks Sean. Comparing, in relative terms, is also very telling: we vary a single parameter and we see the progression of the risk. Example: Risk(at 3000ppm) = 40 x Risk(at 800ppm).
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Reposted by LET'S AIR
Sean Mullen, Ph.D. @drseanmullen.bsky.social · 28/02/2026
I built AIRE, a free browser tool that estimates airborne COVID risk indoors using the PMC framework. It also offers an optional “cigarette pack equivalent.” Why? Because 3% per event is abstract. Cumulative harm is easier to grasp on a familiar scale. 🧵
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LET'S AIR @nousaerons.bsky.social · 26/02/2026
You're right. it is written: "if the level is between 800 and 1500ppm, your ventilation is adequate. You should consider opening windows or doors to improve it more.".
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LET'S AIR @nousaerons.bsky.social · 26/02/2026
We can always do better, but in most classrooms, reaching this level would already be fantastic.
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LET'S AIR @nousaerons.bsky.social · 26/02/2026
Ventilation and air quality in education and childcare settings, a new guidance from 🇬🇧 department of education. UK adopts the global standard for schools: CO2 level must be < 800ppm. The challenge is to make this possible everywhere. H/T @safeairschoolsuk.bsky.social www.gov.uk/government/p...
gov.uk
Ventilation and air quality in education and childcare settings
How schools and other education and childcare providers should monitor and manage ventilation and air quality.
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LET'S AIR @nousaerons.bsky.social · 24/02/2026
Improving indoor environment reduces asthma attacks in adults, study finds. Combining home upgrades with health education can close care gaps and significantly improve life for adults living with asthma. stories.tamu.edu/news/2026/02...
stories.tamu.edu
Improving indoor environment reduces asthma attacks in adults, study finds
Combining home upgrades with health education can close care gaps and significantly improve life for adults living with asthma.
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LET'S AIR @nousaerons.bsky.social · 18/02/2026
Of the 11 mandatory vaccines in France, 8 protect against diseases transmitted through the air we breathe. Airborne transmission is the main route of transmission of childhood diseases and needs to be better understood and taken into account by the various stakeholders involved.
EXAMPLES OF DISEASES FROM PATHOGENS
THAT CAN BE TRANSMITTED THROUGH THE AIR WE BREATHE

Viruses:

Adenovirus

Bocavirus

Varicella zoster virus

Coronavirus (MERS, SARS 1, SARS-CoV-2)

Influenza type A virus (H1N1, H5N1, …)

Influenza type B virus

Morbillivirus

Mumps virus

Rhinovirus

Rubivirus rubellae

Respiratory Syncytial Virus

Variola virus

…

Associated diseases:

Chickenpox

Covid-19

Influenza

Measles

Mumps

Common cold

Rubella

Bronchiolitis

Smallpox

Bacteria:

Bordetella pertussis

Corynebacterium diphtheriae

Legionella pneumophila

Streptococcus pneumoniae

Haemophilus influenzae type b

Mycobacterium tuberculosis

…

Associated diseases:

Whooping cough

Diphtheria

Legionella

Meningitis

Tuberculosis

Fungi:

Aspergillus

Blastomyces dermatitidis

Coccidioides immitis

…

Associated disease:

Aspergillosis

Legend:

Red = There is a vaccine

Yellow = There is a vaccine for some strains

Purple = There is no vaccine

French flag icon = The vaccine is mandatory in France
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LET'S AIR @nousaerons.bsky.social · 18/02/2026
Our updated infographic on airborne diseases is now available as a PDF at letsair.org#mediation
letsair.org
News, infographics and scientific mediation to better understand the challenges of indoor air renewal.
This web-site is designed to raise awareness of the importance of good air renewal in enclosed spaces.
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LET'S AIR @nousaerons.bsky.social · 17/02/2026
The excellent article is from @nypost.com . Sorry.
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