Central Heating
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What is a combi boiler?
The high efficiency condensing combi or combination boiler is an ingenious space-saving idea, and an increasingly popular choice in UK homes. In fact, combis now account for well over half of all the new domestic boilers installed in Britain every year.
The major difference between a combi and any other type of boiler is that a combi eliminates the need to store hot water - so no hot water cylinder in the airing cupboard. It is both a high-efficiency water heater and central heating boiler, combined (hence the name) within one compact unit which usually sits in the kitchen or utility room, or sometimes in the airing cupboard. The space savings result from the fact there is no hot water storage cylinder, cold water storage cistern or other familiar components of a regular (conventional) heating system.
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The further benefits of this are a significant saving on hot water costs, and the fact that hot water is delivered through your taps or shower at mains pressure. So you can enjoy powerful showering* without the need for a pump. Another combi benefit is that it can generally save you money on installation time and costs, since no tank in the roof space means less pipe work and a shorter installation time. |
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What is a regular boiler?
If you are replacing an older model of boiler, the chances are that you will have a regular (conventional) boiler (left). A typical conventional system incorporates a boiler and extended controls, a feed and expansion cistern, and a hot water cylinder (usually in the airing cupboard) which is often fed by a cold water storage cistern located in the loft.
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What is a System boiler?
Unlike a combi, both a system boiler and a regular (conventional) boiler work on the principle of stored hot water - but a system boiler differs from a regular boiler in some important respects.
Firstly, many of the major individual components of the heating and hot water system are built in, which means that installation is quicker, neater, easier and more efficient.
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Unvented system
Secondly, the hot water is pumped from the boiler through the system to the radiators and hot water cylinder, resulting in a fast response and more economical running costs. The system boiler removes the need for a feed and expansion cistern. |
Illustration courtesy of © 2010 Bosch Thermotechnology Ltd
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| You want to use your loft space for a room conversion or other purpose |
COMBI |
| You live in a flat or bungalow (i.e. have very little or no roof space) |
COMBI |
| Your home has more than 2 bathrooms |
REGULAR OR SYSTEM |
| Your main water pressure is low |
REGULAR OR SYSTEM |
| You want to replace an old boiler to improve an existing conventional central heating system |
REGULAR, SYSTEM or COMBI |
| There is a need to have hot water available on tap without waiting for it to heat up. |
COMBI |
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Hot Water
Unvented water heating is the fastest growing sector of the UK market. Unvented systems are fed directly from the cold water mains supply and offer a number of benefits compared to conventional systems. Chief among these are: no cold water storage of water is required, higher pressure and flow rates at all taps therefore no shower pumps required; balanced hot and cold water supplies; no requirement for special taps.
Including trade names of Megaflo, Ozo, Gledhill. Also available for solar applications. Megaflo is one the brand leaders in unvented domestic water heating.
In addition to the basic advantages of unvented systems, NEW high efficiency Megaflo HE (left) offers a number of features that place it well ahead of the competition in terms of performance, quality and reliability.
The NEW high efficiency Megaflo HE now boasts numerous innovative features designed to ensure superior levels of operating efficiency, delivering even more hot water – just when you need it! Thanks to the high-performance ‘coil in coil’ heat exchanger; more hot water is available quicker than ever before.
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Central Heating
