How to reduce Covid-19 transmission in a small meeting room using a Mixed Ceiling Ventilation system

Building system engineering can help decrease the risk of being infected by the aerosol which contains virus-laden droplet nuclei. Many techniques can help decrease the concentrations of particles. This paper focuses on the economic renovation of the existing ventilation system of a public commercial space, a small meeting room in Kuijpers, Leiden, to decrease airborne transmission of respiratory infectious diseases. Simulations and measurements show the effect of different mixed ceiling (VRF) ventilation configurations on Covid-19 transmission with and without filters in Dutch offices.