Over the years there has been significant advance in the development of experimental methods and analysis for the use of tracer gases in the evaluation of ventilation systems. As a rule, these advances have been in the direction of greater complexity and more sophisticated data analysis methods. Most of these advances are difficult for buildings researchers to understand, not to mention the confusion they have created for practitioners.
Considerable emphasis has been placed on energy consumption management in the residential sector in France over the last twenty years, and a regulation device defining requirements of a substantial level was setup at the end of the eighties.
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