The Solenco CF8500 comes with a 3-in-1 filter consisting of a pre filter, HEPA filter and a carbon filter. 

The Pre-filter removes the large airborne particles 

The true HEPA filter removes particles from the air as small as 0.3 microns – smaller than the eye can see. 

The Carbon filter removes smells and odours. 

The enhanced charcoal and HEPA filters have a rubber gasket seal to ensure that no air leaves the air purifier uncleaned. 

The unit has a replace filter indicator light.