Sealed system with a large boiler as the heat source – the system has six central heating or domestic hot water (DHW) zones

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System schematic of a sealed system with a large boiler as the heat source. The system has six central heating or domestic hot water (DHW) zones.

This schematic highlights how the NRG Zone manifold can handle large boilers even though it only has 1″ connections. In this schematic the boiler has 1.5″ flow and return pipes, these pipes split into two before connecting to the NRG Zone. This way the boiler has access to two 1″ connections for both flow and return, meaning it can transfer its entire heating output into the manifold and heating system without restriction.

The NRG Zone 6 manifold ensures that the boiler receives the coldest possible return water so that it is working under optimum conditions and with optimal efficiency. This is especially important for condensing boilers as it greatly increases the likelihood of the boiler operating in condensing mode, which is by far the most efficient. The manifold also ensures that the central heating zones and the DHW cylinder have access to the warmest possible water for their flow. The manifold also provides the system with a full bypass, meaning that the boiler can always maintain its optimal flowrate.

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