Introduction. The first information about Coway water purifier was not available through any type of press release or any other information. No information was available in the Internet either. No information was available about any sort of certification. Thus, there was no retrievable proof on FDA approval or CE marking for Coway water purifiers for drinking water. But the company claimed that all their units had CE mark with SIRIM and Suruhanjaya Tenaga.
However, independent laboratory has proven that there is no such certificate or approval for the brand. Thus, the company claimed to have no cost-effectiveness, but this claim has no corroboration or retrievable evidence. The only thing we could find out about the quality of their products is that they are sold at very high prices, despite of the relatively low production volume. The low production volume may be because they lack good quality control or other problem, which leads to the high price.
So, is there any proof that they have any cost-effectiveness at all? In answer to this question, we could say that the company’s main objective is to increase sales and maximize return on investment (ROI). In short, they would sell as many as possible without considering whether they are providing best possible health to the consumers. They are only concerned about their ROI. In other words, it is a mere hit and miss situation.
Now, what is the way 웅진코웨이 water purifiers work? It uses patented metering system that uses both granular activated carbon and multi block filter used in reverse osmosis water systems. What is wrong with the reverse osmosis water systems? They use hydraulic pressure to force water through the membrane, which results in microorganisms entering the water, and killing them. The metering system that is used by this company claims to eliminate 99% of the microorganisms in drinking water, which they claim is a greater efficiency rate than any other metering system.
In their advertisement, the company claims to provide drinking water with taste and odor free. In fact, it is not true. According to the studies conducted by health organizations and other agencies, the majority of the filtration systems available in the market do not meet drinking water standards. Only a few companies, like Coway, use only approved metering methods of sub-micron filtration, which is considered as the best method for reducing microorganisms.
Although, the Coway water purifier systems meet the required standard, the technology assessment reports do not mention it. There is no information about the efficiency of such devices. Only the cost per gallon and the average consumption for each family are mentioned. However, these figures do not include the cost of replacement filters. If you calculate the cost of the replacement of filter on an annual basis, you will realize that most of the manufacturers give a higher percentage of discount on the entire system.
Another important technology review is about the reverse osmosis water purifiers. The only thing that I could find from the reverse osmosis reviews is that most of them do not like the idea of using RO for water purification. They feel that the RO process wastes large volume of water, which should be reserved for drinking purposes.
There is another study conducted by a group of scientists from National Bureau of Standards. This study clearly states that reverse osmosis filtration is not the most cost-effective or efficient method for treating tap water in homes. In their opinion, ion exchange and a carbon-resin filtration system would be more cost-effective and would meet all standards. All in all, the Coway water purifiers are cost-effective and provide good quality drinking water to millions of households in the US.