Unvented electric water heaters heat water directly from the mains water supply. This means they benefit from higher pressure/flow rates and more balanced hot/cold water supplies and can be installed practically anywhere. They’re the ideal water heating system for properties with multiple outlets, like kitchens and bathrooms. Vented electric water heaters are generally installed over the sink area. They have an open outlet, so rely on a tap or valve opening on the inlet side to displace the hot water stored in the heater. There are ideal for use with single sink needs like in a kitchen, surgery or office. It’s important to understand the difference, so you can search for the right electric water heater for your needs.