I am not a painter. I have heard, however, that it is better to be
pressurizing the painting area via a filtered fan and allowing the excess to
exit via filters.
The rationale proposed was that when using the fan to exhaust the area, air
would enter through all of the crevices and seams that inevitably exist
bringing dust particles with them.
When pressurizing the paint booth, on the other hand, all of those same
seams are letting air out and you r booth is more dust-free.
It made sense to me in a purely theoretical way, but I am not a painter.
David Lieb
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