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

  • KWK Architects Announces Full Transition to Lawrence Group Branding

    KWK Architects recently announced that it will complete its transition to the Lawrence Group brand effective July 1, according to a news release. The merger marks the end of a three-year strategic integration process that began in March 2023 to unite the firms.

  • Phoenix School District Breaks Ground on New Prep Academy

    The Creighton Elementary School District near Phoenix, Ariz., recently broke ground on a campus replacement for Biltmore Preparatory Academy, according to a news release. The new space will allow the school to expand its enrollment by 50 percent for K–8 students and accommodate modern, collaborative learning styles.

  • Florida District Completes Construction on New Leadership Institute

    Pinellas County Schools near Tampa, Fla., recently announced that construction is complete on the new Dr. Michael A. Grego Leadership Institute, according to a news release. The district partnered with Rowe Architects for the project’s design and with Skanska for construction services.

  • Colorado School District Breaks Ground on Unified PK–12 Campus

    The Haxtun School District No. Re-2J in Haxtun, Colo., recently announced that ground has been broken on a renovation/addition project that will unite its two schools, Haxtun Elementary and Haxtun Jr/Sr High School, according to a news release.