Combi Boiler Central Heating System Diagram

A combination or combi boiler is both a high efficiency water heater and a central heating boiler in a single compact unit.

Combi boiler central heating system diagram. For domestic hot water the mains supply is fed direct to the boiler. They have two heat exchangers inside them. Central heating system diagram with high pressure boiler this type of system operates at mains water pressure and uses a stored hot water system. How a combi boiler works at least a modern combi boiler is.

An automatic bypass valve is fitted inside most combi boilers by the manufacturer these days. This diagram illustrates how simple the heating system connected to a combi boiler is. For central heating 2. The central heating portion of a combi is on a pressurised closed loop system heated by the boiler as required.

In direct contrast open vent also called regular standard or conventional boilers and system boilers heat water that s stored in a tank. A primary heat exchanger. Combi boilers heat water directly from the mains when you turn on a tap so you won t need a hot water storage cylinder or a cold water storage tank in the roof space. Secondary plate heat exchanger.

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