For a healthy person it may be pretty difficult to see how waterborne contaminants could compromise one's body system, but for people who already have low body defenses the problem is a dire one. A home water purifier is a must-have item particularly for those who suffer from cancer, AIDS, kidney dysfunctions, asthma or diabetes. In such cases, a waterborne illness may be un-treatable and even fatal. Sometimes smell, taste and water hardness add up to the list of discontents that force one to have a home water purifier installed. No chlorine, no germs, and less money paid on bottled water: these are the great advantages a home water purifier brings. There are two types of home water purifier systems that are fighting for top efficiency positions on the market: the ultraviolet and ozone devices on the one hand, and distillation systems on the other. The former are highly useful by the inactivation of the viruses, but they do not remove the contaminants by themselves. Such a problem can only be dealt with by the combined use of a UV home water purifier and a filter so that only the water free of sediments will pass through the ultraviolet lamp chamber. A home water purifier that relies on distillation will reduce the contaminants by boiling the water; steam is condensed in a special chamber and collected in a storage tank. The disadvantage of such a home water purifier is the possibility that certain contaminants may evaporate and pass into the clean water supply. Furthermore, distillation systems use a lot of energy, they generate heat and are often predisposed to scaling, not to mention that only a pretty low volume of water is produced every day. Consequently, the odds are that you'd be a lot more content with a UV or ozone home water purifier than with a distillation-based one. The installation of a home water purifier meant to deal with the necessities of an entire house should be left to a professional, since things are a bit more complicated than simply attaching a device to a faucet. Home kits will not do for the matter, and it is definitely worth paying some money to a specialized team than to take the risk of improper installation. Periodical checks are also required to make sure that everything works well, and you may also have to replace some filters and other detachable parts that might deteriorate in time.