Sealed system with a heat pump, a radiator circuit, an underfloor heating zone and a domestic hot water (DHW) cylinder

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System schematic of a sealed system with a heat pump, a radiator circuit, an underfloor heating zone and a domestic hot water (DHW) cylinder.

The NRG Zone 4 manifold ensures that the heat pump receives the coldest possible return water so that it is working under optimum conditions and with optimal efficiency. The manifold also ensures that the central heating zones and the DHW cylinder have access to the warmest possible water for their flow.

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