OPEN VENT BOILERS (HEAT ONLY)
A heat only boiler, also known as a regular, conventional or open vent boiler, is a system involving two tanks, a hot water cylinder and the boiler itself. Heat only boilers are typically found in larger properties as they can better meet the demand for hot water across multiple taps and shower heads.
Below we explain how heat only boilers work, how they differ from other systems and how to decide if a heat only boiler is right for your home.