Reply by crank49

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Posted on SawStop DC question

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4032 posts in 2993 days

#1 posted 01-18-2012 05:49 AM

As an engineer who has designed and built and installed hundreds of thousands of CFM of dust collectors, bag houses, cyclones, wet scrubbers, packed tower gas scrubbers, and cartridge filters I can tell you that probably 25% of what Pentz says is almost true.

It is completely absurd to make a blanket statement that you need a certain size of duct or a specific number of CFM to collect the dust from a given type machine. There are many many more factors that come into play. Particle velocity and direction of release, position of the source, cross drafts, temperature, type of blade or tool, speed of blade, how closely is the blade enclosed, duct velocity, etc, etc.

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