🔥The 9th Round of Easy Loan, Earn $40 Reward is in progress❗️ ⏰ Promotion Period: January 15th - Feburary 15th, 2025 👉 Register now and check more details at gate.io/campaigns/358

In 1888, S.H. Woodridge was already teaching at Massachusetts Institute of Technology (MIT) how to ensure good indoor ventilation by measuring CO2 levels. The thresholds he recommended are almost identical to those recommended in 2025 (we've updated the 1888 values because the outdoor CO2 level was then 300ppm).

Our infographic "Airborne Diseases & Vaccines" is now available in PDF format at letsair.org/#mediation

We've begun identifying decentralized ventilation solutions for high-density spaces, such as classrooms. It's a quick and easy way to address excessive room confinement. We welcome your suggestions. Visit letsair.org/#ventilation

An excellent introduction to decentralized mechanical ventilation has been produced by the English company Breathing Buildings in this document: breathingbuildings.com/wp-content/upl… Very clear drawings make it easy to understand the proposed solutions. Thanks to chris iddon for reporting the company.

Salamanca City Central School District Awarded $50,000 National Grant to Improve Indoor Air Quality and Sustainability salamancany.org/o/sccsd/articl…

The Salamanca City Central School District - the only district in New York state - is among the 10 selected to receive $50,000 in grant funding and technical assistance to develop and implement board-approved IAQ Management and greenhouse gas emissions reduction. salamancapress.com/2025/06/23/sal…

Public health is a matter for engineers. We are continuing our inventory of decentralized mechanical ventilation solutions. It's simple, fast, and effective. There's no reason not to consider installing such a system in a daycare, a classroom, an office... letsair.org/#ventilation

Update of our list - non exhaustive - of airborne diseases, included in our 24-page booklet available at letsair.org/#mediation

The Open Air School located in Harrisburg, Pennsylvania opened in 1918. Medical experts viewed fresh air as a key way to prevent tuberculosis, an airborne disease. Today, mechanical ventilation with heat recovery maintains excellent thermal comfort. pennlive.com/galleries/NLZL…

Airborne disease prevention is a complex system involving a multitude of stakeholders. No simple solution, whether economic or social, can be implemented on a large scale. The study of this system must be central to all public health policies and research in this field.

US School Districts Receive IAQ Funding. Organizations are looking more closely at ways the poor indoor air quality in classrooms affects schools — specifically, increased absenteeism, lower test scores and decreased teacher retention rates. facilitiesnet.com/iaq/tip/K-12-D…

IAQ in my dental clinic in Manila is excellent, and the dentists are in FFP2s!

A building is not made up of walls delimiting living spaces, but of living spaces delimited by walls. The quality of the interior environment is now the main challenge of any architectural gesture, well before any other consideration. To ignore it would be sheer folly.