Engineering systems to protect workers from exposure to hazardous materials. Local Exhaust Ventilation (LEV) systems are just one of many engineering control options that can be used to remove and prevent worker exposure to vapors, mists, dusts or other airborne contaminants. It is effective in protecting workers and good design, fit for purpose, constantly maintained and system performance monitored.

Poor design or maintenance can cause leaks in the workplace, causing hazardous exposure. A poorly designed, installed, misused and improperly maintained system can be a costly waste.