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

  • University of Mary Washington Selects Builder for New Theater, Dance Facility

    The University of Mary Washington in Fredericksburg, Va., recently announced that it has selected construction and development firm Skanska to lead a series of renovations and upgrades to fine arts facilities, according to a news release.

  • Missouri K–12 District Cuts Ribbons on Two New Middle Schools

    Springfield Public Schools in Springfield, Mo., recently celebrated the completion of two new middle school facilities with ribbon-cutting ceremonies, according to a district news release. The district officially opened the new Pipkin Middle School and Reed Academy on Sept. 3, both of which were funded through the $220-million Proposition S bond program approved by voters in 2023.

  • Texas A&M Opens First Building at Fort Worth Campus, Breaks Ground on Research Facility

    The Texas A&M University System marked a major milestone in the development of its Fort Worth campus by opening its first completed academic building and breaking ground on a second facility designed to expand research and industry collaboration.

  • Missouri Child Development Center Completes $2.3M Expansion

    The Urban Sprouts Child Development Center in St. Louis, Mo., recently announced the completion of a $2.3-million expansion and adaptive reuse project, according to a news release. The new space includes a retail café, outdoor learning space, and a support office building.