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Airflow dynamics scrub classroom air

Research uses working classroom to study airflow dynamics

March 6, 2024
University of British Columbia Okanagan campus
Accounting for airflow dynamics rather than just airflow volume helped researchers measure an 85% reduction in airborne pathogens inside a working classroom.

If you've ever wondered why some folks never catch the office or school cold, where they're sitting might be keeping them from the path of pathogens, according to new UBC Okanagan research.

Using a working UBCO classroom as their test lab, the team found that accounting for airflow dynamics reduced pathogens in the classroom by 85 per cent.

"During the COVID-19 pandemic, the advice was often just to increase ventilation to the maximum," says Mojtaba Zabihi, a doctoral student in mechanical engineering and a lead researcher in the UBC Airborne Disease Transmission Research Cluster.

"But the new findings show that understanding the airflow pattern is as important, as the amount of air changed per hour. This insight could potentially lead to safer buildings and significant energy savings."

The study measured and analyzed airflow in the classroom to understand its influence on pathogen dispersion. Considering what might be in the room to affect how the air flows -- desk arrangement or vent placement, for example -- and how we design building ventilation systems could help improve standards and improve indoor air quality, Zabihi says.

"Our research demonstrates that an under-floor air distribution concept combined with a ceiling-distributed exhaust system, which generates local and vertically stretched airflow patterns, can significantly reduce airborne pathogens in classrooms by up to 85 per cent," he says.

"If building ventilation systems are designed with disease prevention in mind, it could be a critical tool in maintaining our health."

The research findings, chosen by the editors of the journal Building Simulation for their March cover story, offer promising directions for the design and operation of indoor spaces. Yet, while the study's implications suggest a new avenue for enhancing public health through building design, Zabihi carefully positions the work within a broader context.

"Our research adds an important layer to understanding how we might better protect indoor environments. It's a step toward cleaner spaces, a complementary strategy alongside existing health measures," he says.

Zabihi conducted the work under the guidance of UBCO's Drs. Sunny Li and Joshua Brinkerhoff, whose expertise in mechanical engineering and fluid dynamics provided a foundation for the project. As the results gain traction, Zabihi said the team is hopeful about the research's influence.

"Our goal was always to contribute meaningfully to the conversation on public health and indoor air quality. This publication marks an important milestone in our journey," Zabihi concludes.

"It feels like being on the front lines, making a real difference. It's not just theoretical; we can see how our findings could significantly affect public health and everyday life."

Story Source:

Materials provided by University of British Columbia Okanagan campus. Note: Content may be edited for style and length.

Journal Reference:

  1. Mojtaba Zabihi, Ri Li, Joshua Brinkerhoff. Influence of indoor airflow on airborne disease transmission in a classroom. Building Simulation, 2024; 17 (3): 355 DOI: 10.1007/s12273-023-1097-y

Cite This Page:

University of British Columbia Okanagan campus. "Airflow dynamics scrub classroom air." ScienceDaily. ScienceDaily, 6 March 2024. <>.
University of British Columbia Okanagan campus. (2024, March 6). Airflow dynamics scrub classroom air. ScienceDaily. Retrieved April 21, 2024 from
University of British Columbia Okanagan campus. "Airflow dynamics scrub classroom air." ScienceDaily. (accessed April 21, 2024).

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