@article{Wood_K-2021_99416,
title = {Turn up the lights, leave them on, and shine them all around - numerical simulations point the way to more efficient use of Far-UVC lights for the inactivation of airborne coronavirus},
author = {Wood, K. and Wood, A. and Peñaloza, C. and Eadie, E.},
month = {oct},
year = {2021},
abstract = {It has been demonstrated in laboratory environments that ultraviolet-C (UVC) light is effective at inactivating airborne viruses. However, due to multiple parameters, it cannot be assumed that the air inside a room will be efficiently disinfected by commercial germicidal ultraviolet (GUV) systems. This research utilizes numerical simulations of airflow, viral spread, inactivation by UVC and removal by mechanical ventilation in a typical classroom. The viral load in the classroom is compared for conventional upper-room GUV and the emerging “Far-UVC.” In our simulated environment, GUV is shown to be effective in both well and poorly ventilated rooms, with greatest benefit in the latter. At current exposure limits, 18 commercial Far-UVC systems were as effective at reducing viral load as a single upper-room GUV. Improvements in Far-UVC irradiation distribution and recently proposed increases to exposure limits would dramatically increase the efficacy of Far-UVC devices. Modifications to current Far-UVC devices, which would improve their real-world efficacy, could be implemented now without requiring legislative change. The prospect of increased safety limits coupled with our suggested technological modifications could usher in a new era of safe and rapid whole room air disinfection in occupied indoor spaces.},
pages = {471-483},
volume = {98},
issue = {2},
journal = {Photochemistry and Photobiology},
publisher = {Wiley},
url = {https://doi.org/10.1111/php.13523},
}
