2.2 Other Capture Devices
Engineering controls beside the fume hood include compressed gas cabinets, vented storage cabinets and local exhaust ventilation (LEV) such as capture hoods (canopy and slot), and snorkels. These work to capture and entrain chemical vapors, fumes and dusts at the point of generation. Examples where these devices would be appropriate are welding operations, atomic absorption units, vacuum pumps, work with dry nanomaterials and many other operations in the laboratory. Installation of any of these must be in the consultation of EHS and may include an engineering design to ensure the proper connection into the ventilation systems ductwork.