Fume extraction guns are considered to be a high-vacuum/low-volume fume extraction system. They capture fume directly at the source (from up to 6 inches away), using attachments like a flexible funnel nozzle. 

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Fume extraction guns are considered to be a high-vacuum/low-volume fume extraction system. They capture fume directly at the source (from up to 6 inches away), using attachments like a flexible funnel nozzle. 

Mobile floor models, as shown here, feature an adjustable extraction arm that the welding operator can move toward the weld pool to remove the fume from up to 18 inches away.