I posted pictures of my sanding table at
Hope that works. In the closed picture note the velcro patch on the
left front of the top. That is what holds my sanding curtain which
directs air from the lathe to the air cleaner. The furnace filters
are 14 x 25. The cloth bag filter is labeled 12 x 24, but measures
11 1/2 x 23 1/4 at the top frame.
I use it mostly as an air cleaner to catch what escapes the dust
collector, but it works well as a sanding table with the top down.
I calculated the total square inch of the holes to equal the area of
the exhaust port.
Click to see the full signature.