Air intake velocity sizing
Air intake velocity sizing
(OP)
Discounting the duct velocity, is there an upper air intake velocity for outside air intakes that should be avoided.
I have heard very low numbers to reduce the possiblity of the intake collecting leaves or dragging in rain snow?
Also would intake angle:- vertical,inclined 45 facing down and horizontal have any effect on max velocity?
I have heard very low numbers to reduce the possiblity of the intake collecting leaves or dragging in rain snow?
Also would intake angle:- vertical,inclined 45 facing down and horizontal have any effect on max velocity?





RE: Air intake velocity sizing
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RE: Air intake velocity sizing
Different manufactures/louvres will have different pressure drops, open areas, and weather proofing and louvre manufactures will give advice on pressure drops and water ingress vs velocities.
RE: Air intake velocity sizing
RE: Air intake velocity sizing
They will have the information regarding face velocity, free area, pressure drop, velocity where moisture penetration occurs etc.
If you are just doing a weather hood with a screen then I would agree with PatBethea
RE: Air intake velocity sizing
Could you be more clear on the application? From your posting it appears that your bringing in outside air thru a gooseneck on the roof? Is this the case?