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Last updated: 20 June 2019

Which Is the Best Boiler to Buy?

Choose the Boiler That Fits Your Home the Best

Choosing the right boiler for your home has been proven to be a puzzling task, as there are many boiler brands and types to choose from. Therefore, it is essential to know all the different product specifications and household factors before making your purchase, as they would also affect how much a new boiler costs.

To help, GreenMatch has gathered a list of 3 main factors to give you an insight into what can be suitable to your home. Yet, it is important to always consult with an expert before your purchase.

The three most important factors to consider when buying a boiler are:

Since there are many technical factors influencing your choice of boiler, it is best to consult an expert. If you fill in the form above, GreenMatch will put you in contact with up to 4 suppliers offering the best quotes and deals for your specific needs. This service is provided free of charge and with no obligations.

Boiler Types: Combi, Conventional, System

According to the law made by the Office of the Deputy Prime Minister in 2005, every new boiler installed in the UK has to be a condensing boiler.

Condensing boilers have larger heat exchangers. They extract latent heat (which usually gets lost into the atmosphere) and re-use it as fuel. As a result, homeowners can increase their home’s energy efficiency, lower utility bills, and reduce their carbon dioxide emissions.

There are three main types of condensing boilers: combi boilers, system boilers, and conventional boilers. All of them can either be wall-mounted or floor-standing, depending on the space available and the size of the boiler.

Combi Boilers

Combination boilers — more commonly known as combi boilers — are the most popular type of residential boilers in the UK. In a single unit, they are capable of supplying both hot water and central heating, at the same time.

Combi boilers are compact and usually wall-mounted. As they do not need a hot water storage cylinder or a cold water tank, combi boilers help save space in your home and reduce installation time.

However, as combi boilers heat water on demand, they are rather designed for using 1-2 water taps or a single shower at a time, otherwise either the water might not reach the ideal temperature or the pressure would be insufficient. This makes it a less ideal option for larger households with multiple bathrooms. Combi boilers might also not be the best choice if your home has low water pressure.

Which Is the Best Boiler to Buy?

Conventional Boilers

Also known as regular boilers, conventional boilers consist of both a cylinder and a water storage tank. As a result, installation can be more costly and the system requires far more physical space. As hot water will be preheated and stored before being used, it is important to insulate the cylinder properly to avoid heat loss.

Even though this type of boiler is not ideal for houses with limited space, homeowners can turn on multiple taps or showers at once, without experiencing any issues. Therefore, a conventional boiler is a great option for larger houses, especially for ones located in an area with low water pressure.

This kind of boiler is also an environmentally friendly solution, as it can be integrated with solar thermal systems. In that case, the household would rely on renewable water heating during the daytime, and on the boiler in the evening — or on periods with higher water consumption.

Which Is the Best Boiler to Buy?

System Boilers

System boilers are particularly suited for houses with more than one bathroom, as they have a separate cylinder to store the hot water. The cylinder will need to be sufficiently insulated to maintain efficiency and prevent heat loss.

Unlike conventional boilers, the major heating and hot water components of system boilers are built into the boilers themselves. This makes the installation process significantly faster and easier.

Additionally, as system boilers do not require a cold water tank, they are ideal for houses that have limited or no loft space. System boilers rely on the water pressure of the mains instead of gravity (compared to the cold water tank of conventional boilers).

Like conventional boilers, they can be used in conjunction with solar water heating systems to help you reduce your utility bills and carbon footprint.

Which Is the Best Boiler to Buy?