Infiltration heat loss of buildings taking account of wind and stack effects. Der Luftungswarmebedarf von Gebauden unter Wind und Auftriebseinflussen.

Describes new calculation procedure which forms a basis for 1978 draft in German Standard DIN 4701 "Building heat demand calculation". Defines infiltration heat loss. Examines previous German standard calculation procedure. Outlines basis of natural air flows in buildings in some detail including effect of air pressure and stack effects. Treats pressure distributions affected by wind and stack effects. Describes mass flow balances for 2 building types and infiltration heat losses.