Displaying Adequate Ventilation Provision in Crowded Gathering Places

Abstract

Upon relaxing COVID-19 control, ventilation provision is no more controlled at 6 ACH. However, infectious variant XBB.1.16 gave another wave of infection, 10,000 a day, in Hong Kong. Problems encountered in crowded gathering places without adequate ventilation are discussed. Owners can take two actions proposed earlier voluntarily and advertise that their ventilation provision is adequate. These are on display the instantaneous energy use on ventilation operation and carbon dioxide levels at indoor stagnant positions. Consumers can then have a choice.