Image: Fume hood constant-velocity

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Description: Figure 12. Laboratory constant-velocity hood (note the flow monitor on the sash column). The constant-velocity hood uses a control system to detect the sash position, face velocity and system pressure, and change the fan motor speed or other mechanism, such as mechanical dampers, to increase the air flow when the sash is raised and decrease it when the sash is lowered, thus maintaining a constant face velocity.
Title: Fume hood constant-velocity
Credit: General Safe Practices for Working with Engineered Nanomaterials in Research Laboratories (in en-us). U.S. National Institute for Occupational Safety and Health pp. 20, 22 (May 2012).
Author: U.S. National Institute for Occupational Safety and Health
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Fume hood

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