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Local exhaust ventilation captures contaminates at or very near the source and exhausts them outside. There are two types of mechanical ventilation systems used in industrial settings:ĭilution (or general) ventilation reduces the concentration of the contaminant by mixing the contaminated air with clean, uncontaminated air.
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fan(s) to bring in outside air and exhaust the indoor contaminated air.Įach of these parts are discussed in this series of documents.ducts to move air from one area to another,.an "air intake" area such as a hood or an enclosure,.Systems are composed of many parts including: Parts of an industrial ventilation system: eliminate the use of the hazardous chemical or material,.Other ways to control contaminants include: It is one of the preferred ways to control employee exposure to air contaminants. Ventilation is considered an "engineering control" to remove or control contaminants released in indoor work environments. Why have an industrial ventilation system: Remove or dilute airborne contaminants.Reduce potential fire or explosion hazards.Maintain temperature and humidity at comfortable levels.Provide a continuous supply of fresh outside air.While all ventilation systems follow the same basic principles, each system is designed specifically to match to the type of work and the rate of contaminant release at that workplace. Industrial systems are designed to move a specific amount of air at a specific speed (velocity), which results in the removal (or "exhaust") of undesirable contaminants. Ventilation can be accomplished by natural means (e.g., opening a window) or mechanical means (e.g., fans or blowers). It is commonly used to remove contaminants such as fumes, dusts, and vapours, in order to provide a healthy and safe working environment. In a workplace, ventilation is used to control exposure to airborne contaminants. Ventilation is the mechanical system in a building that brings in "fresh" outdoor air and removes the "contaminated" indoor air.