Combi Boilers, Combination Boilers, Condensing Boilers, Central Heating Gas Combi Boilers, Regular Boilers, System Boilers, Heating Regular Boilers, Heating System Boilers, Hot Water System Boilers
What is a Combi Boiler?
A combi boiler provides heating and hot water directly from the boiler.
Here’s an example of a central heating and hot water system layout using a combi boiler:

A 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.
A combi boiler is both a high-efficiency water heater and a central heating boiler, combined (hence the name) within one compact unit. Therefore, no separate hot water cylinder is required, offering space saving within the property.
Further benefits of a combi boiler are significant savings 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 boiler 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.
Combi Boilers Advantages:
- Combination Boilers are Great because they give both instant hot water and central heating at the same time saving time and energy
- Combi Boilers are Great for smaller properties, saving you space by eliminating the need for a hot water storage cylinder
- Here at WH Boiler & Spares we supply a growing range of combination boilers at a Low discounted prices contact us on 0845 003 8281 for more details
- Our leading combination (combi) boilers Manufacturers are:
- Glow Worm Combi Boilers
- Worcester Combi Boilers
- Vaillant Combi Boilers
- Ideal Combi Boilers
- Baxi Combi Boilers
Regular boilers
What is a regular boiler?
Regular boilers heat your central heating system directly and produce hot water for your cylinder.
Here’s an example of a central heating and hot water system layout using a regular boiler:

If you are replacing an older model of boiler, the chances are that you will have a regular (also known as ‘conventional’) boiler.
A typical regular boiler system incorporates a boiler, extended controls, a hot water cylinder which is often fed by a cold water storage cistern located in the loft and a feed and expansion cistern - also located in the loft.
Here at WH Boiler & Spares you can find a huge range of regular boilers (Open Vent Boilers) from leading manufacturers such as Glow- Worm, Worcester Bosch, Vaillant, Ideal & Baxi Boilers. Why Not contact us here at WH Boiler & Spares on 0845 003 8281 to get our advise on your requirements
- Our leading Regular (open vent) boilers Manufacturers are:
- Glow Worm Regular Boilers
- Worcester Regular Boilers
- Vaillant Regular Boilers
- Ideal Combi Regular Boilers
- Baxi Combi Regular Boilers
System boilers
What is a system boiler?
A system boiler heats your central heating system directly and produces hot water for your cylinder.
An example of a central heating and hot water system layout using a system boiler with an open-vented hot water cylinder:

An example of a central heating and hot water system layout using a system boiler with a pressurised unvented hot water cylinder:

A system boiler, just like a regular (conventional) boiler works on the principle of stored hot water. However, 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 into a system boiler, which means that installation is quicker, neater, easier and more efficient.
Secondly, the hot water is pumped from the system boiler through the heating 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.
- Our leading System boilers Manufacturers are:
- Glow Worm System Boilers
- Worcester System Boilers
- Vaillant System Boilers
- Ideal Combi System Boilers
- Baxi Combi System Boilers