Installing an RO system varies in price significantly depending on several different factors. A few things that will determine the price of your RO system are the size/dimensions, the different components contained within the system, the installation process, and the different stages of the filtration method. An RO system for your entire home can cost up to $12,000; this is because the several components of the system will occupy more space and the technology is very complex. Some of the components that compromise the entire system include a pre-filtering mechanism, the reverse osmosis unit, the pressurization system, and the control panel. The cost of installation is contingent upon acquiring all the right materials and the labor involved in getting everything set up, which also varies according to the needs of the customer. There are also different types of systems you can choose from, which range from Under the Sink Whole Home systems to Floor Stand RO Devices. The price ranges for different RO installations vary significantly, so it all comes to simplicity versus sophistication.