Choosing the right boiler

We understand that purchasing a new boiler is a major expense and can seem confusing and can quickly turn into a burden, particularly with the range of modern options available. Should you wish to discuss first hand with a member of our team, please don’t hesitate to contact us now.

While most old boilers are gas fired ‘regular’ boilers, the first thing you need to decide is what type of boiler you need and best suits your property. When replacing a boiler, you have the option to get a ‘like for like’ regular boiler and keeping your current set up of having a hot water cylinder. Or, alternatively, you can opt for the more popular ‘combi’ boiler which combines the heating and hot water process and is more efficient and eliminates the need for a cylinder, saving space and money.

Below is a breakdown of each boiler to give you a better understanding of each, what their benefits are and what properties they’re best suited to. For more information or to request a no obligation estimate in replacing or installing a new boiler, contact us today.

Condensing Boilers

Condensing boilers produce condense (moisture vapour) from time to time. These boilers use heat from exhaust gases that would normally be released into the atmosphere. To capture this concealed heat, the water vapour from the exhaust gas is turned into liquid condensate. In order to make the most of the latent heat within the condensate, condensing boilers use a larger size heat exchanger or have a secondary heat exchanger.

As a result of this, condensing boilers can extract more heat from the fuel it uses than a standard efficiency boiler. This also means that less heat is lost through the expelled flue gases.

Non-Condensing Boilers

As expected, a non-condensing boiler does the opposite to a condensing and does not produce condense (moisture vapour). Whilst both boilers are similar, a non-condensing does not have a secondary heat exchanger resulting in it being approximately 5-10% less efficient to an equivalent condensing boiler model.

Combi Boiler

A combination boiler, or ‘combi’, provides both hot water and heating directly from the boiler. A high-efficient water heater and central heating boiler all within one unit, combi boilers are the most popular choice of boiler in the UK. As there is no need for a hot water cylinder, these boilers not only save money but save space. Hot water can be delivered on demand through your taps and showers all at mains water pressure. While combis can go up to 42KW, these boilers are best suited to smaller properties with one or two bathrooms. Larger properties should consider regular or system boilers.

Regular Boiler

A regular boiler, or a ‘conventional’ boiler heats your central heating system directly and supply hot water for your hot water cylinder. If you’re replacing an older boiler, it is most likely to be a regular or conventional boiler. A typical regular boiler system incorporates a boiler, hot water cylinder and further controls such as a water pump and if often fed by a cold water storage cistern tank, typically located in an attic or loft, alpng with a smaller expansion cistern tank.

System Boiler

Just like a regular (conventional) boiler, these boilers work on the principle of storing water, whilst feeding your central heating system directly from the boiler. Hot water is produced by boiler to be stored in a hot water cylinder. These systems come with two configurations; vented or unvented. Despite their similarities, system and regular boiler differ.

The main difference being that system boilers have all major components built into the boiler, making installation quicker, tidier and usually more straightforward. Furthermore, a system boiler pumps water through the heating system to serve radiators and the hot water cylinder. This result in a faster response and a more economical and efficient boiler system, saving money in the process. Essentially, a system boiler eliminates the need for a feed and expansion tank usually found in attic.