How to make indoor air safer (but not necessarily safe) during the pandemic. By Brian Resnick@B_resnickbrian@vox.com Part of The Vox guide to navigating the coronavirus crisis SARS-CoV-2, the virus that causes Covid-19, can float in the air. In particular, it can linger in poorly ventilated indoor spaces, spreading farther than 6 feet from
Relative sizes of various allergens
Discussion:
Diagram showing the relative sizes of a human hair, dust mite, ragweed, pollen in microns. PM25 refers to 2.5 microns.
Diagram showing the relative sizes of a human hair, dust mite, ragweed, pollen in microns. PM25 refers to 2.5 microns....
An Open Letter To Joel Wachtel re. HB2315
Mr. Wachtel is a member of the SeaTac City Council and chairs their Aviation Advisory Committee. The following letter was e-mailed to key Councilmembers in Des Moines, SeaTac, Normandy Park, Tukwila and Federal Way. Hi Joel, As I mentioned at yesterday’s Highline Forum, HB2315 is moving ahead very fast. There have been two hearings so
Installing air filters in classrooms has surprisingly large educational benefits
$1,000 can raise a class’s test scores by as much as cutting class size by a third. By Matthew Yglesias@mattyglesiasmatt@vox.com An emergency situation that turned out to be mostly a false alarm led a lot of schools in Los Angeles to install air filters, and something strange happened: Test scores went up. By a
EPA: Residential Air Cleaners – a technical summary 3rd edition
Aviation-Related Impacts on Ultrafine Particle Number Concentrations Outside and Inside Residences near an Airport
Jet engine exhaust is a significant source of ultrafine particles and aviation-related emissions can adversely impact air quality over large areas surrounding airports. We ...
Estimates of HVAC filtration efficiency for fine and ultrafine particles of outdoor origin
Parham Azimi, Dan Zhao, Brent Stephens Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL, USA Received 31 July 2014, Revised 26 August 2014, Accepted 3 September 2014, Available online 4 September 2014. Abstract This work uses 194 outdoor particle size distributions (PSDs) from the literature to estimate single-pass heating, ventilating, and air-conditioning (HVAC) filter removal efficiencies for