Skip to main content
Add as a preferred source on Google

Classroom Purifier Cuts Infection Risks in Half—Same as Opening Windows

  • By Dian Schaffhauser
  • 03/08/21

A study in two South Korean high schools found that window ventilation reduced the risk of COVID-19 infection by 55%, while the use of an air purifier shrank the risk by 50%. The combination of the two dropped the risk by nearly three-quarters (73%). Researchers from the Infrastructure Safety department at the Korea Institute of Civil Engineering and Building Technology (KICT) said the use of the air-purifying device worked best when it was placed in the middle of the room, which was sized to hold about 25 students.

The study ran several rounds in which the performance of various antiviral and antibacterial air purifiers was tested in an actual classroom. Virus-like salt microparticles were released into the air as aerosols, and the researchers measured the concentration levels in succession in the center and at the edge of the room during each round to simulate the presence of an infectious student.

For a final round, the researchers worked with a specific air purifier: the AiroDoctor WAD-M20. The testing, which ran over the course of several days, assumed that students didn't move about the space and maintained distances from each other.

The AiroDoctor is a $4,000, free-standing device about the size of a 13-gallon garbage can. According to coverage of the study, students weren't bothered by noise from the machine.

"We are very pleased about the groundbreaking results from South Korea," said Carsten Hermann, managing director of ScreenSource GmbH, which produces the machine, in a press release. "We trust that the relevant authorities nationally and internationally will take notice of such important studies. After all, the globally unique filter technology of the AiroDoctor can make an important contribution in a long-term strategy against SARS-CoV-2."

About the Author

Dian Schaffhauser is a former senior contributing editor for 1105 Media's education publications THE Journal, Campus Technology and Spaces4Learning.

Featured

  • North Carolina District Completes New Elementary School

    The Wake County Public School System (WCPSS) in Holly Springs, N.C., recently announced that construction on a new elementary school has finished, according to a news release. Rex Road Elementary School measures in at 133,000 square feet and is the fifteenth school that general contractor Balfour Beatty has completed for the district.

  • Kimball International Releases Curated Design Support Program

    Commercial furnishings company Kimball International recently announced the launch of a new end-to-end design support program, DesignSuite. According to a news release, its goal is to guide architecture & design professionals and dealer partners through the process from vision to specification.

  • T&T Construction Management Group Completes Pasco High School Expansion

    Pasco High School in Dade City, Fla., recently announced that it has completed an expansion project in partnership with T&T Construction Management Group, Inc., Harvard Jolly Architecture, and Williams Company.

  • Geometric abstract school illustration

    How Design Shapes Learning and Success

    Can the color of a wall, the curve of a chair, or the hum of fluorescent lights really affect how a student learns? More schools are beginning to think so.

Digital Edition