Measurements of air change rate and ventilation efficiency in buildings. Misure di portata d'aria di ricambio e di efficienza della ventilazione negli edifice

Describes the general methodology for ventilation measurements by tracer gas, using decay, constant concentration and constant emission methods. Defines ventilation efficiency and the ways in which it can be experimentally determined. Gives the results of a series of lab measurements to determine the accuracy of the decay method under different conditions, and the efficiency of some mechanical ventilation systems.