What is the key factor when installing a source capture system?

The key factor when installing a source capture system is placement near contaminants. This positioning is crucial because the main objective of a source capture system is to effectively collect harmful fumes, vapors, dust, or other pollutants at the point of generation before they can disperse into the workplace environment. By locating the capture device as close as possible to the source of contamination, the system can minimize exposure and ensure a safer atmosphere for workers.

When the system is strategically placed near the contaminant sources, it enhances the likelihood of capturing the emissions efficiently, thereby reducing the overall pollution load in the workspace and improving air quality. Proper placement not only increases the system's effectiveness but also can lead to lower energy usage since less effort is needed to capture pollutants that are otherwise dispersed in larger areas.

The other factors, such as efficient energy use, size of ducting, and height above the floor, are important considerations in the design and functionality of a mechanical system but do not hold the same significance as the strategic placement near the contaminants when it comes to the primary goal of maximizing capture efficiency.