For which operations is local exhaust ventilation commonly used?

Local exhaust ventilation is primarily utilized in processes where harmful gases, vapors, dust, or fumes are generated at the source. This method involves capturing contaminants at or near the point of origin before they disperse into the surrounding air, thereby minimizing exposure to workers.

In hot work or grinding operations, such as welding, cutting, or grinding metals, significant amounts of particulate matter and fumes can be produced. These operations often release hazardous materials that can pose health risks to workers if inhaled. Local exhaust ventilation systems are specifically designed to address these risks by providing effective means to control airborne pollutants, ensuring a safer work environment and compliance with health and safety regulations.

While indoor air quality improvement may involve various ventilation strategies, it does not specifically rely on local exhaust systems for source capture. Cremation processes produce emissions but are typically managed through more comprehensive exhaust systems rather than localized ventilation. Similarly, forest fire control does not involve environmental contaminants that can be effectively managed by local exhaust ventilation, as it relates more to managing large-scale outdoor air quality issues rather than localized source capture.