The H300 has the same exceptional filtration capability as all Everpure drinking water systems, with the added benefit of removing VOC's (Volatile organic compounds).There are over 40 different types of VOC's in our water supplies.  Some are more well known than others, such as THM's (Trihalomethanes).  THM's are created when chlorine combines with natural organics present in water.  THM's are considered carcinogenic. Other VOC's include: PCB's, Benzene, Carbon Tetrachloride and Toluene.The H300 is certified as a Bacteriostatic filter (bacteria control) and can also reduce scale build-up in kettles and coffee makers.