Highlights

• Investigated UR-GUV performance in airport bus, classroom and rehearsal room.
• Ceiling height is crucial for UR-GUV performance.
• UR-GUV cannot sufficiently reduce infection risk in near field in the three spaces.
• With UR-GUV, people need to socially distance in rooms, and wear mask in the bus.
• UR-GUV can offset the increased risk due to air-recirculation with low filtration.

Abstract

This study used Computational Fluid Dynamics (CFD) to investigate air disinfection for SARS-CoV-2 by the Upper-Room Germicidal Ultraviolet (UR-GUV), with focus on ceiling impact. The study includes three indoor settings, i.e., low (airport bus), medium (classroom) and high (rehearsal room) ceilings, which were ventilated with 100% clean air (CA case), 80% air-recirculation with a low filtration (LF case), and 80% air-recirculation with a high filtration (HF case).

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