air

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

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.

Read More @ ScienceDirect

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

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.

Read More @ The Middletown Press

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

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.

Read More @ WE-Ha.com

EPA Testing DIY Air Purifier Built by Fifth Graders

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.”

Read More @ WRAL.com

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

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.

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.

Read More @ Time.com

UConn’s Homemade Air Purifiers that Trap COVID-19, Make Cleaner Air Given to Classrooms

FARMINGTON, Conn. — A group of students from the University of Connecticut along with team members at UConn Health in Farmington built an air purifier out of furnace filters, a fan and tape.

It’s called the Corsi-Rosenthal box, and it traps the COVID-19 virus inside.

“It captures fine particular matter in the air about as fine as a commercial filter,” said Marina Creed, APRN of UConn Health’s MS Center.

It also captures dust, mold, pollen and, of course, viruses.

“We’ve found these are incredibly effective at lowering the levels of particles and these particles transmit infectious diseases like COVID and the flu in classrooms,” said Dr. Kristina Wagstrom from the UConn School of Engineering.

Read More @ Fox 61

White House’s Office of Science and Technology Policy Recognizes UConn’s Indoor Air Quality Initiative Fighting COVID-19

Story originally published on UConn Today

Office of Science and Technology Policy group photo with air purifier

UConn Health nurse practitioner Marina Creed’s University of Connecticut cross-campus do-it-yourself indoor air purifier project continues to gain momentum — all the way to the White House.

Creed’s patients in UConn Health’s Multiple Sclerosis Center are among the more vulnerable to severe illness from COVID-19. Motivated by her role as both a clinician and a parent, last year she initiated a cross-campus public health initiative to get what are known as “Corsi-Rosenthal Boxes” into public school classrooms.

The boxes are an uncomplicated combination of easily obtained supplies that can be assembled in minutes. The components — a box fan, pleated air filter panels, cardboard and duct tape — add up to less than it costs to travel to Washington, D.C., where Creed presented members of the Biden administration’s Office of Science and Technology Policy (OSTP) a DIY air purifier by the UConn team and Hartford school children.

On September 9 she and UConn School of Engineering’s Associate Professor in Chemical and Biomolecular Engineering Kristina Wagstrom visited a fifth-grade science class at Hartford’s Noah Webster Microsociety Magnet School, where they presented a STEM lesson that included the assembly of two DIY purifiers.

One, decorated in the school’s color, red, stayed in the classroom; the other, decorated as “Air Force One” and signed by the class, would be on its way to the White House the next day.

“It was an incredible opportunity for our team to showcase this important intervention made by Hartford public school students to the Office of Science and Technology Policy and gift ‘Air Force One’ to the team within the executive office of the president,” Creed says. “It was wonderful to see the children’s STEM lesson come to life. The unit is inside the Eisenhower Executive Office Building, and we hope it will make its way into the West Wing for the president and first lady to appreciate.”

The DIY air filtration kits have been shown to be comparable to manufactured portable HEPA filters.

“It was great to see how excited the students were to work on something that would have real impact,” Wagstrom says.

Creed says their UConn team’s research includes using state-of-the-art cloud-based air quality monitoring sensors to capture critical data showing the intervention’s effectiveness in improving indoor air quality in real-world settings. The sensors, called MODULAIR-PM, are provided by Quant-AQ, an air quality startup in Somerville, Massachusetts.

“The evidence is clear – clean indoor air keeps students healthier and happier. We are excited to learn more about how these students put this evidence into action to benefit their community,” said Dr. Erica Kimmerling, Senior Advisor for Public Engagement at the White House Office of Science and Technology Policy. “The ‘Air Force One’ air filter will not only help provide clean air to the staff at the White House Office of Science and Technology Policy but it will be a great conversation starter to help spread the word about the ways people can improve indoor air quality.”

Creed was honored to be gifting the device to the White House OSTP alongside a major advocate of the DIY Corsi-Rosenthal intervention, Kimberly Prather, Distinguished Professor of Atmospheric Chemistry at University of California San Diego (UCSD) and the Scripps Institute of Oceanography. Members of President Biden’s OSTP accepting the gift were Kimmerling, Dr. Georgia Lagoudas, senior advisor for biotechnology and biodefense, and Dr. Stephanie Guerra, assistant director for national security and biodefense.

In the spring, the Office of Science and Technology Policy held a webinar titled “Clear the Air of COVID-19.” Creed emailed the office to explain her indoor air filtration project, and in reply received an invitation to give a 30-minute briefing. As a capstone to the briefing, Creed, whose hometown is Washington, D.C., offered to bring a box made in the community by school children. The response to that was an invitation for a formal delivery to the White House.

“I was humbled that our work is being noticed at the federal level, and I am eager that our project will result in widespread improvements in public health through low-technology, low-cost, energy-efficient STEM projects that fifth grade school children can do,” Creed says. “It was heartwarming to know that a private citizen like myself can take an idea inspired by direct patient care and continue to push for the fruition of the vision that I have had, which is that these should be in every classroom in the state of Connecticut, if not throughout the country. It felt great to know that there’s federal support behind this initiative that we are working on.”

Support isn’t only coming from the federal government. In August the UConn Foundation announced a $300,000 grant funded through cryptocurrency from Balvi, an investment and direct giving fund established by Vitalik Buterin, the co-creator of Ethereum, to back the Indoor Air Quality Initiative. In May, Creed was recognized with one of UConn’s 2022 Provost’s Awards for Excellence in Community Engaged Scholarship.

The filtration systems are named for their creators, Richard Corsi, dean of engineering at the University of California-Davis, and Jim Rosenthal, CEO of Texas-based company Tex-Air Filters. Since last year Creed has been working to get them into Connecticut schools, and to teach students how to make them as part of a science and health lesson.

The students who helped create ‘Air Force One’ at the Webster Magnet School were impressed.

“We made an air filter that can help take away the germs and bacteria, and it’s really useful because a lot of kids got COVID now and earlier in the year,” says Elijah Ruiz, 10, of New Britain.

“It’s really cool that you can just get a few items that only cost a couple of dollars and make something that can make such a difference,” says Mia Lee, 10, of Manchester.

“It’s something that could be life-changing for everybody, and it can cure a lot of diseases, like COVID,” says Nayeli Rockwell, 10, of East Hartford.

What about the idea that something they helped make and put their names on would be going to the White House?

“Out of this world,” Nayeli says.

“That’s crazy,” Elijah says.

“It’s really, really cool, because Joe Biden is our president,” Mia says.

The Indoor Air Quality Initiative’s UConn cross-campus collaborators include: UConn Health and its Comprehensive Multiple Sclerosis Center, UConn School of Medicine and its Department of Public Health Sciences, UConn School of Engineering, UConn School of Nursing, Connecticut Area Health Education Center Network (CT AHEC), and the UConn Neag School of Education.

A Viral Sensation

DIY air filterWhen Dr. Richard Corsi floated an idea on Twitter for a highly effective, inexpensive, DIY air purifier to help lower the risk of Covid, his light-bulb moment went viral in the best possible way. Now many of America’s top scientists—and even the White House—are touting the invention, and people all over the planet are thinking inside the box.

T​​his story started, as so many do, with something small. In this case, magnitudes smaller than the period at the end of this sentence—a tiny droplet carrying the SARS CoV-2 virus.

It all began on Jan. 20, 2020, when environmental engineer and air quality expert Dr. Richard Corsi, the man at the center of this particular story, tweeted out a BBC article about a “new virus in China” that by that point had led to only two confirmed deaths. But Corsi could read between the lines and commented on the news with these five prescient words: “This deserves the world’s attention.”

By February, concerned that the virus could be airborne, Corsi dropped his routine of going to the gym six days a week and stopped taking public transportation.

The story got bigger from there—much bigger.

A lifelong academic specializing in air quality, Corsi was especially concerned about the ability of cash-strapped schools to protect their students and faculty. In July, as students prepared to return to school, his concern grew considerably, and he tweeted: “Public K-12 schools serve as a place to work or learn for more than 15% of the total population of the United States each year. IMHO, they are THE critical ‘business’ to watch during re-opening in the fall. I’ve worked w/ many school districts and know how resource-constrained they are and, in many cases, strained in terms of facilities staff. This gives me gr8 concern. If not done right the educational, health & econ impacts could be devastation on top of current devastation.”

Read More @ Sactown Magazine