Choosing the right boiler

So, you’ve decided it’s time to change your boiler but you don’t know what type of boiler you need. There are several factors to consider when choosing the right boiler, like finding a Gas Safety registered engineer or choosing a good boiler guarantee. To help you, our team of heating engineers in Warrington compiled this list of key points of what to look for when choosing the right boiler.

Energy efficiency 

Like any other modern appliance, boilers have to be energy efficient. The energy efficiency is measured by how much fuel the boiler uses, how much it converts into energy and how much is wasted in the process. All UK boilers have to be at least 92% energy efficient, but the closer to 100% your boiler is, the better it is for the planet and your bank balance. A gas safety registered engineer can help you compare your options and make the right choice for your needs.


Kilowatts measure how much energy your boiler uses to heat your water. To give you an idea about how many kilowatts your boiler will need, on average a boiler with a heat load of 24 to 30 kilowatts will heat a 3 or 4 bedroom property.


The size of the boiler depends on factors such as the size of your property, number of radiators and the type of heating system you have already installed. A gas safety registered engineer can help you make the right choice if you are unsure of the size to get for your home.

Different types of boilers 

There are several different types of boilers to choose from, but the type of boiler you choose could depend on factors like your existing central heating system or the number of radiators you have. To break down the different types of boilers that a Gas Safety registered engineer might install in your property, here are the things to know:

Combination Boiler:

Known as a combi-boiler, the combination boiler is usually a single unit with two functions: hot water and heating. Cost-efficient and space saver, the combi-boiler is the most popular type of boilers in UK homes.

House connected to mains gas supply
No need for a separate tank
Less harmful emissions
Easier to install
A constant supply of hot water

Regular boilers 

Known as a ‘traditional’ or ‘conventional’ boilers, regular boilers are gravity feed and require a desperate cold water tank that is usually in a loft space. Their main advantage is that regular boilers work even if the water pressure is low.

Suitable for a large property
Suitable when replacing an existing regular boiler
Compatible with solar heating systems
Immersion heater can be added as a back up in case of a boiler break down.

System Boilers 

System boilers don’t require a separate gravity feed tank as regular boilers do, and all the heating components are built-in. System boilers store the hot water in a cylinder, which makes it possible to receive continuous hot water flow from multiple water point. They are ideal for properties with more than one bathroom.

Easier to install than a Regular boiler
No need for cold water gravity feed tank
Heats and stores water in a single tank
Suitable for properties with more than one bathroom

How much does a new boiler cost?

On average, the price of a new boiler and installation is between £ 1,100 and £3,000. The price varies depending on factors such as the type of boiler and what installation is required for the boiler you have chosen.
All boilers come with a guarantee, but some brands have longer guarantees than others. If you get a Worcester boiler and have it installed by a accredited Worcester Bosch installer, you can get a 12 year Worcester boiler guarantee to go with it.
Our heating engineers in Warrington and the North West are available to answer your questions and give you their best advice on the right boiler for your needs and your budget. 

Contact JW Heating Services today on 0800 612 8920