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Draught or ventilation? Tjyvdrag eller ventilation?

Nylund P-O., 1977
air infiltration | air leakage | wind | pressure difference | turbulence
Bibliographic info: Byggmastaren no.7-8
Languages: Swedish

Shows by comparison with simplified methods for dimensioning structural beams that the degree of tightness of a shell is not the arithmetic sum of the leakage of components. States that leakage occurs where there is a pressure difference caused by wind, temperature difference and fans. The amount of leakage depends on whether the air flow is laminar or turbulent. Gives equations for the calculation of leakage in buildings without ventilation, with natural ventilation, with mechanical evacuation and with both mechanical inlet and evacuation.


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