Description: : Throughout the world governments instituted a variety of measures to try to curb the spread of COVID-19 and improve public health. In the UK that took the shape of a nationwide lockdown as of the 23^rd of March 2020. This mandate continued until the 13^th of June. These restrictions led to atypical patterns of home occupancy, the implications of which are still unknown.

The work shown in this presentation took advantage of an existing IAQ and window operation monitoring study taking place in east London, UK. One-year’s worth of monitored data on indoor and outdoor environment parameters along with occupant use of windows was used to analyse the impact of lockdown on IAQ and infer probabilistic models of window operation behaviour. Moreover, using on-site CO₂ data, monitored occupancy and operation of windows, the team calibrated a thermal performance model of one of the spaces to investigate the implications of alternative ventilation strategies.

The use of this type of model, one in which energy, thermal, and air quality performance is integrated has great potential to be used to better understand how changes in our built environment impact health, and at what cost. A conceptual framework for modelling health impact into the built environment will also be introduced.