I am in the early stages of designing a portable downdraft box to be used on top of a bench. It will probably be about 24" x 48". I am looking for recommendations for optimal hole size/spacing and required CFM for this size unit. Any help would be appreciated.
(Dust Collection and Safety Equipment Forum)
From contributor G:
Sanding dust is pretty light weight. If you used 1" holes and about 50-75 CFM per sq ft you would probably get good results.