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

  • UNH Marks Construction Milestone on Oceanic Exploration Facility

    The University of New Hampshire in Durham, N.H., recently celebrated a major construction milestone with a beam-signing ceremony for the new Center of Excellence for Operational Ocean and Great Lakes Mapping, according to a news release. The facility’s ultimate goal is to support research, training and technical assistance in ocean mapping.

  • Cleveland High School Breaks Ground on Modernization

    Portland Public Schools in Portland, Ore., recently announced that construction has begun on a modernization project for Cleveland High School, according to a news release. The existing building will be replaced with a new, 300,000-square-foot facility at the same site.

  • Growing Allied Health Workforce Demands Fueling Greater Need for Higher Education Facilities

    With the demand for healthcare professionals at an all-time high, colleges and universities are challenged with supporting the workforce demands in their own communities. Careers in allied health generally require specific training and/or certification, with some positions requiring degrees, certified credentials, and continuing education.

  • Sam Houston State University Completes Athletic Stadium Renovations

    Sam Houston State University in Huntsville, Texas, recently announced the reopening of Elliott T. Bowers Stadium after an extensive renovation project, according to a news release. The university partnered with Stantec and DLR Group for the project’s design.