What is the primary purpose of ventilation in hazardous locations?

The primary purpose of ventilation in hazardous locations is to dilute flammable vapors and reduce concentration levels. In environments where flammable gases, vapors, or dusts are present, maintaining an atmosphere that is safe for employees and equipment is critical. Proper ventilation helps to lower the concentration of these hazardous materials to below their lower explosive limits (LEL), thereby minimizing the risk of fire or explosion.

Effective ventilation systems work by introducing fresh air into the hazardous area and allowing contaminated air to escape. This process not only helps to control the atmospheric composition but also aids in removing heat generated from equipment and processes that may further contribute to unsafe conditions. In situations where flammable substances are present, ensuring that their concentrations are kept low through dilution is essential for maintaining a safe working environment.