Joint ventilation

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A sales room with free ventilation through the open entrance. Outside air flows in through natural convection in the lower area and room air flows out in the upper area. In addition, exhaust air escaping from the building through joints and the chimney (small red arrows) causes the influx of additional outside air, which is marked here with ventilation .

Joint ventilation is free ventilation that is caused by leaks, especially in doors or windows.

Joint ventilation is caused by pressure differences between inside and outside, which are caused by temperature differences or winds. Because of the convection at low outside temperatures, warm air escapes through the upper joints and cold air enters through the lower joints. Especially in high rooms, such as B. stairwells or church buildings , the air exchange caused by joint ventilation can be significant. The size of the joint area in the exterior of the building is decisive for the strength of the air exchange.

For many living spaces, especially in old buildings, the air exchange caused by joint ventilation is usually sufficient to achieve a comfortable air condition. In the case of new buildings with tight joints, however, regular window opening ( push ventilation ) is required.

See also

literature

  • Recknagel, Sprenger, Schramek: Pocket book for heating and air conditioning . 68th edition. R. Oldenbourg Verlag, Munich / Vienna 1997, ISBN 3-486-26214-9 , pp. 1063-1064.

Web links

Wiktionary: Joint ventilation  - explanations of meanings, word origins, synonyms, translations

Individual evidence

  1. ↑ Ernst Neufert: Building design theory . Braunschweig / Wiesbaden 1996, ISBN 3-528-68651-0 , p. 109
  2. ↑ Jürgen Roloff, Klaus Graupner: Building climatic problems, connections and conclusions when dealing with the window component . TU Dresden, Faculty of Architecture, Institute for Building Climatology, p. 27
  3. ↑ Claus Meier: Bureaucratic action instead of proven solutions? In: Building protection and renovation: Interior - Moisture protection , Cologne 2006, p. 21