For an entirely new installation s plan would be a far better choice as that does not have the default open problem and also allows the use of multiple zones for the central heating.
Unvented heating system diagram.
There are three types of domestic hot water system.
A guide to the most common types of domestic heating and hot water systems with diagrams including indirect boiler system unvented system thermal store.
Unvented hot water systems.
As unvented cylinders work from the power of the mains water supply the mains pressure and flow rate must be adequate.
A guide to the different ways of heating domestic hot water so you can identify problems and faults with the hot water tank or central heating system and carry out any maintenance needed.
This first is a combi boiler system where the boiler directly heats the water on demand.
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Visit the unvented cylinder page on our interactive house for comprehensive information on unvented hot water systems.
The s plan is popular because it is versatile you can add an unlimited number of zones simple to wire and easy to fault find on.
S plan heating systems are now the most common type of system installed in the uk after combination boiler systems which do not have any external motorised valves.