
Open vented system with a boiler as the heat source – the system has four central heating zones or domestic hot water (DHW) zones
Download PDF System schematic of an open vented system with a boiler as the heat source. The system has four central heating zones or domestic hot water (DHW) zones. The NRG Zone 5 manifold ensures that the boiler receives the coldest possible return water so that it is working under optimum conditions and with optimal […]