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

  • 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.

  • Tennessee Tech Starts Construction on New ACME Building

    Tennessee Tech University recently held a groundbreaking ceremony for the new Advanced Construction and Manufacturing Engineering (ACME) Building on its campus in Cookeville, Tenn., according to university news. The $89.6-million facility is the second in a recent expansion of the College of Engineering’s buildings on campus. It’s currently scheduled to open at the end of 2028.

  • Lawrence Group Announces Expansion of Student Housing Studio

    Integrated planning and design firm Lawrence Group recently announced that it has hired Nick Naeger, AIA, as the new Associate Principal / Senior Project Manager at its headquarters in St. Louis, Mo., according to a news release.

  • ClassVR Wins Tech & Learning Best of Show at ISTELive 25

    Avantis Education recently announced that its flagship product, ClassVR, won the Tech & Learning Best of Show Award at ISTELive 25 in San Antonio, Texas, according to a news release. The program is designed to celebrate products that are “transforming education in schools around the world and that show the greatest promise for the industry,” and this is the fourth consecutive year that Avantis has claimed the award.

Digital Edition