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

  • Wold Architects & Engineers Acquires VPS Architecture

    Full-service planning, architecture, and engineering firm Wold Architects & Engineers recently announced that it has acquired VPS Architecture, according to a news release. The move will help strengthen Wold’s education and public-sector design expertise, industries in which both companies have strong pre-existing ties and relationships.

  • A digital silhouette works at a computer, immersed in a glowing, interconnected world

    How Will AI Transform Learning Space Design?

    For years, higher education has designed learning spaces around technology as a tool for display, capture, collaboration, and connectivity. AI changes that equation.

  • Benson Polytechnic High School in Portland, OR

    Preserving Legacy, Designing for the Future

    As historic academic buildings age, institutions face a difficult decision: preserve and adapt or demolish and rebuild. How do we honor the legacy of these spaces while adapting them to meet the needs of modern learners?

  • Image courtesy of Kahler Slater

    UW–Madison Announces Completion of Morgridge Hall

    The University of Wisconsin–Madison recently announced that construction is complete on Morgridge Hall, a new academic building, according to a news release. The facility opened September 3 at the start of the fall semester, consolidating the School of Computer, Data & Information Sciences into a single facility for the first time.