An air movement system for capturing pollutants in the air directly where they are produced and carrying them away before they can spread throughout the work area.
A system for capturing and exhausting contaminants from the air at the point of origin, as in welding, grinding, sanding, or laboratory experiments.
refers to a system used during welding, cutting or other similar operations in confined spaces as necessary to remove harmful gases, smoke and fumes.
(Also known as exhaust ventilation.) A ventilation system that captures and removes the contaminants at the point they are being produced before they escape into the workroom air. The system consists of hoods, duckwork, a fan and possibly an air cleaning device. Advantages of local exhaust ventilation over general ventilation include: It removes the contaminant rather than dilutes it; it requires less airflow and thus is more economical over the long term; and the system can be used to conserve or reclaim valuable materials. However, the system must be properly designed with the correctly shaped and placed hoods; and correctly sized fans and duckwork.
A ventilation system that captures and removes contaminants at the site of generation before they escape into the workroom air. The system consists of hoods, duct work, a fan and possibly an air cleaning device. Advantages of local exhaust ventilation over general ventilation include that these systems require less air volume and are more economical over the long term. The system must be properly designed with properly designed and located hoods and correctly sized fans and duct work.
involves the capture of pollutants at the source.
An industrial ventilation system that captures and removes contaminants emitted from nearby sources before dilution into ambient workplace air can occur.
