Recirculating portable air filtration (PAF) units may supplement existing building ventilation in classrooms and reduce disease transmission (e.g., COVID-19) via the direct aerosol route (i.e., direct inhalation of aerosol particles) and an indirect aerosol route (i.e., contact with the surface[s] where aerosol particles deposited). We systematically investigated how three PAF units impacted localized and whole-room surface deposition and particle concentrations within a classroom. Results revealed that peak concentrations were reduced by a factor of ~2.5 by the PAF units, leading to an approximate 33% reduction in average deposition velocities for horizontal surfaces >2.5 m from the aerosol source. PAF units can thus reduce suspended particle concentrations and deposition throughout a classroom space when properly positioned with respect to the location of the potential infection source(s) (e.g., where the largest group of students sit) and the room's predominant air distribution profile.
|Original language||English (US)|
|State||Published - 2022|
|Event||17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022 - Kuopio, Finland|
Duration: Jun 12 2022 → Jun 16 2022
|Conference||17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022|
|Period||6/12/22 → 6/16/22|
Bibliographical noteFunding Information:
This study was funded by Delos Living, LLC. However, Delos Living, LLC, had no input on any part of the trial process.
© 2022 17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022. All rights reserved.
- Airborne Virus Transmission
- Particle Deposition
- Portable Air Filtration Unit