Experimental study on the efficiency of mechanical ventilation in inhabited spaces. Etude experimentale sur l'efficacite de la ventilation mecanique controlee dans un local d'habitation.

Ventilation efficiency involves two aspects, to preserve thermal comfort, draughts should be avoided and yet one tries to obtain the best "sweeping out" which corresponds with a maximum exhaust of contaminants from the occupied zone for a given flow rate.< Reports study of 75 tests of ventilation efficiency made in a climatic roomrepresenting a heated living room. Thermal comfort was tested by measuring the air velocity both in the ventilation jet and in the occupied zone. Mixing of the ventilating air was measured by recording the concentration of a tracergas at about 10 points inside the room.