WHAT IS CENTRAL HEATING

Central Heating means heating from a central source. Most modern central heating systems use water as the medium to get heat from the central source (boiler) to all the areas to be heated.

There is no such thing as a standard central heating system, you can tailor the system to suit your needs and with advanced controls the central heating system will be able to constantly monitor and adjust your central heating (without you having to do anything). However even a basic Central Heating system when programmed should look after itself with regards to turning itself on & off automatically, and should use no more fuel than necessary for your needs. Central heating systems when optimized and programmed correctly or additionally with advanced controls, should keep your house at the correct temperature. It should also provide all the hot water you need, when you need it. All this will be achieved whilst burning the minimum amount of fuel.

A centrally heated house will normally be cheaper to run than any other form of heating. For instance independent fires, even just one fire can be more expensive to run than a well designed central heating system with good quality controls.

Condensing Boilers

Condensing boilers are highly efficient boilers that have much lower fuel and running costs than conventional boilers.Take up has been slow ever since they were first introduced in the early 1980s due to a number of misconceptions and a general lack of awareness. Since then the technology has improved and there has been an increase in the number of trained installers.

In dispelling the misconceptions or ‘myths’ associated with condensing boilers, it is hoped that the barriers to specifying and installing condensing boilers will be finally removed.This will result in a sustained increase in market share throughout the UK, benefiting householders and the environment alike.

Benefits of Condensing Boilers

Condensing boilers offer tangible benefits by:

• Reducing carbon dioxide emissions and helping to combat global warming.
• Improving household efficiency thus reducing fuel bills. Condensing boilers work on the principle of recovering as much as possible of the waste heat which is normally rejected to the atmosphere from the flue of a conventional (non-condensing) boiler.

This is accomplished by using an extra-large heat exchanger or sometimes two heat exchangers within the boiler which maximises heat transfer from the burner as well as recovering useful heat which would normally be lost with the flue gases. When in condensing mode (for condensing boilers do not condense all the time) the flue gases give up their ‘latent heat’ which is then recovered by the heat exchanger within the boiler.

As a result the temperature of the gases exiting the flue of a condensing boiler is typically 50-60°C compared with 120-180°C in a current non-condensing boiler.At the same time an amount of water or ‘condensate’ is produced.

The benefits of condensing boilers are therefore quite clear, a condensing boiler will always have a better operating efficiency than a conventional non-condensing one, due to its larger and more efficient heat exchanger.

Source: Gas Safe

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