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

  • FAU Starts Construction on Holocaust and Jewish Studies Building

    Florida Atlantic University recently began construction on a new academic building for its campus in Boca Raton, Fla., according to university news. The Kurt and Marilyn Wallach Holocaust and Jewish Studies Building will stand two stories, measure in at 22,000 square feet, and play home to the university’s Holocaust education and Jewish studies programs.

  • Tufts University Breaks Ground on Two New Residence Halls

    Tufts University in Medford, Mass., recently broke ground on two new residence halls with a total capacity of 664 beds, according to local news. The project’s ultimate goal is to expand on-campus housing and reduce pressure on the local housing market.

  • A university

    Breaking Higher Education's Billion-Dollar Backlog Problem

    Strategic mechanical system design can transform campus maintenance backlogs. Here's how.

  • Texas A&M Breaks Ground on Campus Visitor Center

    Texas A&M University in College Station, Texas, recently held a groundbreaking ceremony for a new campus learning hub and visitor center, according to a news release. The 211,000-square-foot Aplin Center will stand three stories and is scheduled to open to students in 2028.

Digital Edition