I would like to find a chart that gives the static pressure required to move different types of particles. Specifically what static pressure would be required to exhaust the overspray from spray painting with latex paints and water based polyurethane?
We are spraying knick naks and small pieces of furniture and the overspray dust gets out into the whole shop. We would like to find the right exhaust fan to solve the problem.
In a nutshell - you need a spray booth equipped with filters. Here is a link to FAQs - http://www.binks.com/Resources/FAQs/SprayBoothFAQs/tabid/932/Default.aspx
And keep in mind, whenever you exhaust air (with a fan) you may also need make-up air.
One way to better understand this process is to pay a visit to a nearby auto body shop. Most have spray booths.
For the minor amount of spraying that I do occasionally, I pick a calm day, and go outside to my driveway and do the spraying.