RoomVent2020. 15th Virtual Conference Proceedings book. Energy efficient ventilation for healthy future buildings

In the event of a fire, the performance of a pressurised stairwell in a multi-storey building is analysed for different operating conditions. The analysis is performed with the CFD code FDS 6.7.1. Different fire scenarios (air flow through an open fire door, pressure difference through a closed fire door) are modelled following the only available European standard to demonstrate that building occupants can safely egress during the fire. "Cold" and "on fire" scenarios are compared; the role of the fire in the design of a pressurization system, to correctly assess the pressure difference across a closed fire door connecting a stairwell and a corridor, is underlined.