Local exhaust ventilation (LEV) is a system designed to capture and remove airborne contaminants at their source. It typically consists of a hood, ductwork, and a fan that work together to draw harmful substances away from workers in environments like factories or laboratories. This helps to maintain a safe and healthy workplace by reducing exposure to dust, fumes, and vapors. LEV systems are essential in industries where hazardous materials are used, such as construction, manufacturing, and chemical processing. By effectively controlling air quality, LEV not only protects workers but also helps comply with safety regulations and standards set by organizations like OSHA (Occupational Safety and Health Administration).