One of the best engineering control that should be implemented at workplace is use and installation of Local exhaust ventilation (LEV). LEV is only one of many engineering control options that may be used to remove and prevent employee exposure to vapour, mist, dust or other airborne contaminants. To be effective in protecting the employee(s), it is important that it is of good design, is fit for purpose, is regularly maintained and the systems performance is monitored. Failure to do so can lead to employees being exposed because they have the impression that the system is effective when it is not.

Poor design and/or maintenance may lead, for example, to leakage in the workplace, causing concentrated local exposure rather than preventing it. A poorly designed, installed, misused and incorrectly maintained system can become an expensive waste of expenditure and may give a false impression of hazard control. Please refer to below picture for basic LEV system.

What can be said or add up to Local exhaust ventilation?