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Minimum angle for vent hood

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AlbertaMecchie

Mechanical
Joined
Feb 17, 2021
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19
Location
CA
I am designing a vent hood for an application about 3500 cfm. What is the minimum angle of the vent hood sides
 
There is none. Your hood has to capture whatever fumes you are dealing with, and that has nothing to do with sidewall angles. Often hoods are just cubic plenums.
 
There is no minimum angle, but any angle will have an associated pressure drop which you find in SMACNA manuals.
 
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