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

  • Clemson to Launch North America’s Largest College Campus Smart Parking Program

    Clemson University in Clemson, S.C., recently announced a partnership with smart parking and curbside management solutions provider eleven-x to launch a smart parking initiative for its population of 29,000 students and faculty, according to a news release.

  • Exhale Fans Launches New Generation of Bladeless Ceiling Fan

    Exhale Fans recently announced the launch of Gen. 5 of its flagship HVAC delivery product, the world’s only bladeless ceiling fan, according to a news release. The fan provides users with a 10% savings on HVAC energy costs and requires no renovations to current systems to install.

  • Singlewire Software Report Reveals Gaps in K–12 School Entrance Security

    Single Software recently released its first-ever School Entrance Security Report based on more than 500 responses from U.S. school staff members. According to a news release, the findings highlight a gap between K–12 leaders’ wishes for school safety and how safe the schools actually are, as well as the challenges facing students and staff in that goal.

  • Dallas ISD Debuts New Peabody Elementary School

    The Dallas Independent School District in Dallas, Texas, recently announced the completion of the new facility for George Peabody Elementary School, according to a news release. The district partnered with Pfluger Architects and REEDER Construction on the 70,807-square-foot replacement campus, which has the capacity for 550 students.

Digital Edition