The GX is the primary filter and takes the brunt of the grease and heat and uses centrifugal impaction to remove large grease particles. The secondary filter uses a 1/2-inch packed bead bed to remove, by interception, the small particles of grease that are not removed by the GX filter.
The GG filtration system utilizes these two filters to remove 100 percent of the particles that are 8 microns or larger in diameter and 80 percent of the particles that are 3 microns in diameter.