POU stands for "Point of Use," which refers to systems or devices that provide services or products directly at the location where they are needed. This term is commonly used in contexts like water purification, where a POU water filter can be installed at a tap to ensure clean drinking water is available right where it is consumed. In addition to water filtration, POU can apply to various other applications, such as POU heating systems that deliver hot water directly to a faucet. These systems are designed to improve efficiency and convenience by minimizing the distance that resources must travel, ultimately enhancing user experience.