Exhaust Ventilation

Exhaust ventilation works by enclosing the source of the hazard as much as possible and ensuring enough air flow to manage the material in question. This is preferable for more serious atmospheric hazards. Exhaust ventilation systems usually contain:

• An enclosure or inlet of some sort to take in the air as close to the source as possible
• A duct that moves the hazardous air away from the source, keeping it isolated
• A filter to remove the hazard from the air
• A fan or other air-moving device to keep up the necessary flow
• An exhaust system for removing the air from the confined space

Depending on environmental regulations, you may need a filter for the material you are ventilating. Furthermore, certain hazards need special ventilation systems. For instance, there are special systems for removing perchloric acid or for preventing the buildup of explosive materials within ducts.

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