Local Exhaust Ventilation – Protecting the Worker from Exposure to Air Contaminants
There are a variety of ways to protect a worker from exposure to an air contaminant. The best option is to eliminate contaminants!! Often this is not possible!
The second option is to isolate the process from the worker (Enclosure) or isolate the worker from the process (Control Room or Booth).
The third option – and often the most practical approach – is to exhaust the contaminant at the point of generation AND before it gets into the worker’s breathing zone or in the workroom air. This process is often referred to as LOCAL EXHAUST VENTILATION.
There is a vast variety of methods to accomplish this depending upon the characteristics of the contaminant to be captured.