A compact water heating appliance powered by electricity and holding twenty gallons of water is a common solution for households or small businesses with limited hot water demands. These units are readily available through major retailers specializing in home improvement supplies.
Such appliances offer a relatively inexpensive initial purchase price and ease of installation compared to larger or gas-powered alternatives. They are suitable for point-of-use applications, such as supplying hot water to a single bathroom or kitchen sink, or for supplementing a larger water heating system. The accessibility of these units through established retail channels provides convenience for consumers.