A computer technique for predicting smoke movement in tall buildings.

Describes a computer technique for analysing air movement resulting from stack effect in a tall building. Describes the method which determines the air flows for all possible paths through exterior walls and within the building. The building is divided into multi-storey zones based on the design of the building and the HVAC system. Gives an example of the method applied to a building under two different climatic conditions. Considers the problem of thedifficulty in opening doors due to excess pressure across the door. Method requires knowledge of wall and window leakage and the effective crack areas of internal doors.