The purpose of industrial ventilation systems is to achieve suitable air quality by removing odors. Industrial ventilation solutions can provide comfort conditions by maintaining required temperature and humidity. Occupational safety utilizes industrial ventilation to remove flammable vapors. Occupational health requirements can be achieved from the removing toxic particles, gases and vapors, airborne contaminants. Ventilation systems can be categorized as local exhaust or dilution (general) types. A basic dilution (general) ventilation system consists of an exhaust fan extracting air from the contaminated workspace and exhausting it to the outdoors. A general ventilation system may include a replacement air system, replacement-air distribution ducting, and air-cleaning equipment on the exhaust stream. General exhaust ventilation (GEV) is applicable where the contaminants of interest are not highly toxic and if the rate of generation is predictable. This is most practical in situations where multiple contaminant sources are scattered throughout the workspace or where the sources are mobile, such as forklift charging warehouse or battery storage facility. Local exhaust ventilation (LEV) is applicable where contaminants of interest are removed at or near the source, thus minimizing the opportunity for the contaminant to enter the workspace atmosphere. The basic LEV system includes an exhaust hood, ducting, a fan, and an exhaust outlet. LEV systems are used in a wide variety of settings, from laboratory hoods, commercial kitchens, foundries, and welding booths.