air quality

Efficacy of Do-It-Yourself Air Filtration Units in Reducing Exposure to Simulated Respiratory Aerosols

Posted on August 7, 2023 by Creed, Marina

Many respiratory diseases, including COVID-19, can be spread by aerosols expelled by infected people when they cough, talk, sing, or exhale. Exposure to these aerosols indoors can be reduced by portable air filtration units (air cleaners). Homemade or Do-It-Yourself (DIY) air filtration units are a popular alternative to commercially produced devices, but performance data is limited. Our study used a speaker-audience model to examine the efficacy of two popular types of DIY air filtration units, the Corsi-Rosenthal cube and a modified Ford air filtration unit, in reducing exposure to simulated respiratory aerosols within a mock classroom. Experiments were conducted using four breathing simulators at different locations in the room, one acting as the respiratory aerosol source and three as recipients.

Optical particle spectrometers monitored simulated respiratory aerosol particles (0.3–3 μm) as they dispersed throughout the room. Using two DIY cubes (in the front and back of the room) increased the air change rate as much as 12.4 over room ventilation, depending on filter thickness and fan airflow. Using multiple linear regression, each unit increase of air change reduced exposure by 10%. Increasing the number of filters, filter thickness, and fan airflow significantly enhanced the air change rate, which resulted in exposure reductions of up to 73%. Our results show DIY air filtration units can be an effective means of reducing aerosol exposure. However, they also show performance of DIY units can vary considerably depending upon their design, construction, and positioning, and users should be mindful of these limitations.

Middletown Students’ DIY Air Filtration Units Being Tested for EPA Certification

Posted on August 7, 2023 by Creed, Marina

MIDDLETOWN — Fifth-graders enrolled in an elementary school’s STEM Academy are eagerly awaiting the results of testing conducted by the U.S. Environmental Protection Agency to see if their do-it-yourself air filter is capable of removing viruses and improving air quality.

Macdonough Elementary School uses project-based learning in its science, technology, engineering and mathematics-focused studies. “My students are curious. They’re problem-solvers. Those are the skills you need in the 21st century,” STEM Academy teacher John Ferrero said.

A student’s grandmother sent an article to his class in September about Corsi-Rosenthal filters, simple-to-make devices using a box fan and furnace filters, which inspired them to try and create their own to determine if they made the classroom “healthier,” he said.

DIY Air Purifier Mentioned in West Hartford Business Buzz: July 31, 2023

Posted on August 7, 2023 by Orlando E

Last week Environmental Protection Agency (EPA) scientists started testing “Owl Force One,” a low-cost, do-it-yourself “Corsi-Rosenthal” box air purifier that can protect against infectious aerosols, like the virus that causes COVID-19. The testing is taking place at the EPA Homeland Security Division Laboratory’s high-tech, advanced biochamber, UConn Health announced. “We’re here to test ‘Owl Force One’ against MS2. A student from Connecticut has created this box with her classroom of fifth graders.

EPA Testing DIY Air Purifier Built by Fifth Graders

Posted on August 7, 2023 by Creed, Marina

After wildfire smoke and the COVID-19 pandemic caused a surge in demand for air purifiers, which can be expensive or out-of-stock, the “Corsi-Rosenthal” box was born.

The simple, inexpensive device is crafted from a box fan, MERV-13 air filters, and duct tape.

Ten-year-old Eniola Shokunbi, who lives in Middletown, Connecticut, had the idea to make the box with her classmates and conduct an experiment to see if better air quality improved student attendance. She reached out to researchers at the University of Connecticut, proposing a collaboration.

“She hand-wrote me a letter and I was so impressed,” said Marina Creed, the university’s Indoor Air Quality Initiative director and an adjunct instructor at the UConn’s School of Medicine.

The students decorated the box and dubbed it “Owl Force One.”

Social Media and Duct Tape are Helping People Make DIY Air Purifiers That Filter Out Wildfire Smoke

Posted on June 13, 2023June 14, 2023 by Creed, Marina

NEW YORK (AP) — Social media users are sharing a surprisingly effective way to protect yourself indoors from the toxic wildfire smoke blanketing much of the East Coast: a box fan, four air filters and a whole lot of duct tape.

As searches for “air purifiers” spike on Google, people are posting on TikTok and Facebook about how to build the DIY air purifier. The technique, known as the Corsi-Rosenthal method, has gained attention in recent years amid the pandemic and raging western U.S. wildfires.

As Toxic Wildfire Smoke Lingers, Americans Are Turning to DIY Air Purifiers

Posted on June 13, 2023June 14, 2023 by Creed, Marina

NEW YORK — Social media users are sharing a surprisingly effective way to protect yourself indoors from the toxic wildfire smoke blanketing much of the East Coast: a box fan, four air filters and a whole lot of duct tape.

Smoke from Canadian wildfires ease; Check the air quality near you

Posted on June 13, 2023June 14, 2023 by Creed, Marina

Air quality alerts ease in Connecticut and New York after a week of smoke and haze rolled across the Northeast from wildfires in Canada.

Over 100 wildfires are burning throughout Quebec and Ontario. Combined with an upper-level low pressure system over Nova Scotia, Canada is on track to its worst wildfire season on record.