What is the difference between a particulate filter and a coalescing filter?
A particulate filter has a course element usually rated between 5 -100 microns and only traps particulate matter on the surface of the element. Because of the turbulences of the air flow created by the baffle in the filter, some solid liquids will drop out of the air. Coalescing filter are often rated to remove aerosols that are substantially smaller than the nominal size of the smallest solid particle that would be captured.