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Air Flow - Which is the operational difference between LAF (vertical and horizontal) and RLAF?

Olgamargarita

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#1
Dear all,
please help, which is the operational difference? I have seen a lot of diagrams and the flow air between them are the same: extract air from the environment then filter and then is inject in work zone, then extract and a percent of air recirculate and the other is eliminate by filter to the environment.

very thankfuly for your comments.

Olga
 
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Marc

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#3
A quick "Bump". My Thanks in advance to anyone who can help.
 
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