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 Kentucky Integrates New Cleaning Technology

    The University of Kentucky in Lexington, Ky., recently installed a new cleaning system designed to improve cooling efficiency on campus, according to a news release. The Facilities Management’s Utilities and Energy Management Unit installed new chiller tubes into two of the chillers at the university’s Central Utility Plant.

  • Design Firm Populous Acquires Fentress Architects

    Design firm Populous, which specializes in sports and entertainment venues, recently announced its acquisition of Fentress Architects, based in Denver, Colo., according to a news release. Fentress’ primary focus is aviation projects and public buildings like museums, convention centers, and government facilities

  • Springfield Breaks Ground on $53.7M Pipkin Middle School Rebuild

    Construction is underway on a new, state-of-the-art Pipkin Middle School in Springfield, Mo., a major step in Springfield Public Schools’ (SPS) long-term facility improvement plan, according to local news. The $53.7-million project officially broke ground in early June, following years of planning and community input aimed at modernizing aging infrastructure and addressing student capacity concerns.

  • Case Study Highlights Texas District’s Campus Security Upgrades

    The Taft Independent School District near Corpus Christi, Texas, recently partnered with Intech Southwest Services to revamp its campus security technology system, according to a news release. Intech has released a case study on its website detailing the process that advanced the district’s technology by more than 20 years in less than three weeks.

Digital Edition