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Diagram: Secondary Hoods for Fugitive Emission Control
Diagram: Secondary Hoods for Fugitive Emission Control - For problems with accessibility in using figures and illustrations in this document, please contact the Directorate of Technical Support and Emergency Management at (202) 693-2300.


Applications Tips:
  • Thoroughly characterize fugitive emissions prior to design
  • Provide Make-up air
  • Avoid the use of man-cooling fans

Design Characteristics:
  • Q = (Natural rising velocity at hood face at 100 FPM) times surface area of hood in square feet
  • V is greater or equal to 4000 FPM transport (horizontal runs)
  • he = 2.2VP

For problems with accessibility in using figures and illustrations in this document, please contact the Directorate of Technical Support and Emergency Management at (202) 693-2300.
 

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Occupational Safety & Health Administration
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