Unvented Central Heating System Diagram

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.

Unvented central heating system diagram.

In an unvented system there is no header tank and the water in the pipes is under pressure. One givaway is that there is often a pressure gauge on the boiler measured in bar. Modern heating systems run by gas boilers tend to be unvented or pressurised. A guide to the most common types of domestic heating and hot water systems with diagrams including indirect boiler system unvented system thermal store.

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. For more advice call our technical team or request a site visit to review your current heating system. 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. The electric versions use a coiled heating element to heat the water rapidly in a.

Instantaneous hot water heating systems this method involves using gas or electricity to heat the water to a useable temperature without the need to store the water. When the water in a pressurised system expands the pressure in the. However our purewell variheat cast iron condensing boiler can be installed in an open heating system. The diagram below shows the general layout of an unvented hot water system.