Ventilation and permeability of dwellings. Ventilation et transparence a l'air des habitations.

Describes method for calculating the adventitious ventilation of a building using information from a pressurization test. The method requires a knowledge of the surface pressures on a building, calculated from wind speed and direction, the inside-outside temperature difference, and the distribution and characteristics of openings in the building shell. Applies formulae to threebuildings and finds a great dependence of infiltration on wind direction. Discusses the effect of wind and stack effect, separately and combined. Discusses the effect of the tightness of the building shell on the efficiency of mechanical ventilation.