Does local exhaust ventilation effectively remove contaminants that are spread across a wide area?

Local exhaust ventilation is designed to capture and remove airborne contaminants at or near their source before they can disperse into a broader area. However, when contaminants are spread across a wide area, the capability of local exhaust systems to effectively reduce overall exposure may diminish. This is because local systems are more effective in confining and controlling contaminants that are generated in a specific location, such as a machine or workstation, rather than contaminants that are pervasive throughout a larger space.

In situations where contaminants are distributed over a wide area, they may not be effectively captured by local exhaust systems, which typically focus on specific sources of pollution. Instead, a more comprehensive ventilation strategy, such as general ventilation, may be necessary to ensure adequate air quality across the entire space. Therefore, saying that local exhaust ventilation effectively removes contaminants in a wide area is not accurate, making the assertion that it is false the correct understanding in this context.