4. Treatment of gaseous emissions using curative solutions

4.1 Basic good practice in aeraulics

The design of an industrial ventilation system, whether or not combined with an off-gas treatment system, is the result of a combination of numerous technical, economic, energy and human factors. It's always a question of compromise between the ideal solution and the technical and financial resources that can reasonably be deployed. With this in mind, it is preferable to opt for localized capture systems rather than energy-intensive general ventilation. Air physics follows the same principles as fluid mechanics. A large number of factors influence the flow of air, and concepts that seem obvious can turn out to be wrong. The following examples illustrate some of the most common misunderstandings.

• Air...