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Sealed system (vented DHW)

Sealed System Vented DHW

The sealed system is an ever increasingly popular type of heating system due to its simplified design.

The system is fed and pressurised with water direct from the mains, then sealed. This eliminates the need for the system water feed tank and open vent pipe work in the loft.

This therefore simplifies and reduces the cost of the installation process and reduces maintenance requirements (there are fewer components to maintain!). In the diagram on the left a conventional tank-fed indirect hot water cylinder has been used with its own header tank in the loft.

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