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

  • Arizona District Breaks Ground on Community Training, Learning Center

    The Tolleson Union High School District (TUHSD) in Tolleson, Ariz., recently broke ground on a new Training & Learning Center (TLC) for both district professionals and the community at large, according to a news release. The 90,000-square-foot facility has an estimated completion date of spring 2027.

  • University of Kansas Breaks Ground on Entrepreneurship Hub

    The University of Kansas in Lawrence, Kan., recently held a groundbreaking ceremony for the new KU Entrepreneurship Hub, according to university news. The Hub is part of the university’s School of Business and will include spaces for experiential learning and programming.

  • Houston-Area High School Breaks Ground on 117,000SF Multi-Use Facility

    North Shore Senior High School, part of Galena Park ISD in Houston, Texas, recently broke ground on a new multi-use facility for student extracurriculars, according to a news release. The North Shore Multi-Use Facility will include dedicated practice and training space for the school’s athletics and fine arts programs.

  • Architectural Power for the Modern Campus Landscape

    For generations, an outdoor classroom only required a textbook and a patch of grass. Today, not only has the laptop replaced the printed pages, the rise of agile learning has turned campuses into study halls with students listening to lectures and researching topics from quads, gardens, and plazas. The challenge for architects and facility managers is to provide connectivity without cluttering the landscape with visual eyesores or creating safety hazards with extension cords.