HealthMate Air Filter FR400. The Austin Air HealthMate filter utilizes 60 square feet of certified true medical High Efficiency Particulate Arresting (HEPA) filter media to remove 99.97% of all particles down to 0.3 microns and 95% down to 0.1 microns. The HEPA is surrounded by 15-lbs. of activated carbon and zeolite mixture that chemically binds to and absorbs odors, smoke and VOCís. Activated carbon is porous, thereby increasing the surface area available for absorption. Zeolite is a microporous mineral that aids in the absorption of some compounds better than activated carbon.