What device is used to capture welding fume at or near the arc?

Local exhaust systems are specifically designed to capture welding fumes at or near the source, which is the welding arc. These systems typically include a hood that is positioned close to the welding operation. The hood captures the hazardous fumes and particles produced during the welding process before they can disperse into the working environment. This not only helps maintain air quality but also protects the welder from inhaling harmful substances, significantly reducing the risk of respiratory issues.

While portable fans can move air around and provide some level of air circulation, they are not specialized in capturing specific harmful fumes at the source like local exhaust systems. Air conditioners primarily are used for cooling and cannot effectively remove welding fumes, and structural ventilation refers to the broader system used to exchange stale air for fresh air in a building rather than specifically targeting the source of welding fumes. Hence, local exhaust is the most effective and appropriate device for capturing welding fumes directly at the source.