The calculation of air infiltration rates caused by wind and stack action for tall buildings.

Developes a simple procedure for calculating exterior wall pressure differences and air infiltration rates for various wind velocites and direction by applying the pressure data obtained from a wind tunnel model study to a computer model building. Gives separate expressions for air infiltration caused by stack action and by wind and an expression for the combined effect. Gives example of infiltration calculations compared with computer results and finds good agreement.