TagHEPA Filters(10)
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2023-07-22 21:44Tips to safely prepare your home for wildfire season indoors (and out)
By Amber Katz Special to At Home in the Northwest Wildfire season has begun early this year in King County, with smoke expected to be even worse than last year. This reality makes preparing the home for health and safety reasons essential. “My whole state is in the forecast for this summer being in the -
2023-05-19 20:06HEPA Air Purifier Example
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2023-03-07 12:52
Wirecutter: The Best Air Purifier
By Tim Heffernan Updated March 7, 2023 Photo: Connie Park FYI We have tested and reviewed the Molekule Air Pro and Air Mini+, and will be reviewing several other purifiers soon. March 2023 [Sign up for Wirecutter’s newsletter to get independent reviews, expert advice, and the very best deals sent straight to your inbox.]Air purifiers -
2021-10-18 20:49Air purifiers
Should you get an air purifier? If you live near the flight path, the answer is ‘Yes’. Not only because of the aviation emissions, but also because of roadway emissions, the increasing prevalence of wildfires, and, if you have a Port Package, the increased risk of indoor mold. So many choices… However, the question of -
2020-11-12 21:43
Treat air quality to safeguard buildings against COVID-19
By Gus Simonds Special to The Times Enough sweatpants and Zoom meetings already. Employees who have worked from home since March because of COVID-19 want to get back to the office to enjoy the face-to-face camaraderie and collaboration with mentors and teammates. Parents are anticipating getting their children back into the classroom. Winter is approaching, making -
2020-11-10 11:38Airproofing: piloting a strategy for improving air health in East Boston
Thanks to Scott Hersey. -
2020-01-13 13:03Air filters, Pollution and Student Achievement
This paper identifies the achievement impact of installing air filters in classrooms for the first time. To do so, I leverage a unique setting arising from the largest gas leak in United States history, whereby the offending gas company installed air filters in every classroom, office and common area for all schools within five miles of the leak (but not beyond). This variation allows me to compare student achievement in schools receiving air filters relative to those that did not using a spatial regression discontinuity design. I find substantial improvements in student achievement: air filter exposure led to a 0.20 standard deviation increase in mathematics and English scores, with test score improvements persisting into the following year. Air testing conducted inside schools during the leak (but before air filters were installed) showed no presence of natural gas pollutants, implying that the effectiveness of air filters came from removing common air pollutants and so these results should extend to other settings. The results indicate that air filter installation is a highly cost-effective policy to raise student achievement and, given that underprivileged students attend schools in highly polluted areas, one that can reduce the pervasive test score gaps that plague public education. Suggested citation: Gilraine, Michael. (2020). Air Filters, Pollution and Student Achievement. (EdWorkingPaper: 20-188). Retrieved from Annenberg Institute at Brown University: http://www.edworkingpapers.com/ai20-188 Michael Gilraine New York University VERSION: January 2020 EdWorkingPaper No. 20-188 Air Filters, Pollution and Student Achievement Michael Gilraine∗ Department of Economics New York University December 20, 2019 ABSTRACT… -
2020-01-08 11:45
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 -
2019-12-15 21:21
2020 Washington State Senate Bill 6168 Sec. 603 (42) Indoor Air Quality Study
State Budget (SENATE BILL 6168, Sec. 603) (42) $50,000 of the general fund—state appropriation for fiscal year 2021 is provided solely for the department of environmental and occupational health sciences to provide an air quality report. The report will study the relationship between indoor and outdoor ultrafine particle air quality at sites with vulnerable populations, -
2014-09-03 22:25Estimates 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