Types of Water Heating Systems

 

DIFFERENT TYPES OF WATER HEATERS

If your hot water system is vented, you may have:

An electric immersion heater, which heats the water inside a hot water cylinder. Sometimes two are fitted.

A water heating boiler, which heats the water and transfers it to a hot water cylinder. There may be a back-up immersion heater.

Central heating, in which water heated by the boiler heats the water inside the hot water cylinder via a coiled heat exchanger. Again, there may be a back-up immersion heater.

If your hot water system is unvented, you may have:

A separate ‘instantaneous’ gas or electric heater. Single-point heaters supply one hot tap while multi-point heaters supply several taps. Larger versions also have a built-in hot water storage tank.

A combination system (eg ‘Combi’) in which a central heating boiler and ‘instantaneous’ heater are combined with a small storage tank.

 

UNVENTED HOT WATER SYSTEM

Water is fed to the heater — and from here to the hot taps — at mains pressure. Expansion occurs within the heater (or in a sealed expansion vessel) and there are a number of safety devices built-in to release steam if the system overheats.

 

WHO IS RESPONSIBLE FOR THE WATER SUPPLY?

The water undertaking is responsible for the supply up to and including their stopvalve. If the valve no longer works, you can ask them to fix it.

You are responsible for the rest of the system, including the service pipe and rising main. If either pipe gets damaged, the water undertaking can make you carry out repairs (though this should be covered by your house insurance).

23. May 2011 by admin
Categories: Heating, Plumbing | Tags: , | Comments Off on Types of Water Heating Systems

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