Calculation of infiltration air exchange in buildings. Berechnung des Filtrationsluftaustausches in Gebauden.

Points out importance of ventilation heat losses in calculating total heat requirements of a building, and necessity of its analysis for multi-storey buildings. Describes bases and possible fields of application of a quick and efficient calculation method. Calculations demonstrate that ventilation heat loss varies considerably from storey to storey, and that a standard storey should not be used when calculating the heating surfaces required for individual rooms.