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Slash your energy bills by installing an energy efficient boiler
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As the cost of living crisis looms over everyone, paying off energy bills is becoming increasingly frustrating. That’s why it might be time to upgrade your central heating system. A boiler installation costs anywhere between £1,100 and £5,000. While installing a new efficient boiler can be quite the investment, in the long run, you can expect to save up to £640 on your annual heating bills. Selecting one of the best new boilers can be difficult without help. Fortunately, there are many specialists and boiler installers in St James's that can help you in your search for a new boiler.
All you have to do is fill out a quick and easy 30-second form and we’ll supply you with up to 3 free, non-binding quotes from the professionals who can provide the best boiler installation in St James's. Click the button below to get started.
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Type of boiler | Cost excluding installation | Cost including installation | Average, inc. installation |
---|---|---|---|
Combi | £500 – £3,000 | £1,500 – £4,500 | £3,000 |
System | £580 – £3,500 | £1,580 – £5,000 | £3,290 |
Conventional | £600 – £3,500 | £1,100 – £5,000 | £3,050 |
Electric | £590 – £2,500 | £1,590 – £4,000 | £2,795 |
Biomass | £4,000 – £12,000 | £6,000 – £21,000 | £13,500 |
The main different types of boilers are combi (including gas combis and electric combis), system, and conventional boilers. The boiler replacement cost can vary in terms of efficiency, the parts they use, and the different fuel types they run on.
Combi boilers are currently the most popular home heating system in St James's. The most energy efficient boiler models reach efficiency rates of up to 98%, meaning that they will warm up your home without wasting too much fuel in the process. If you’re looking to install a combi boiler, make sure to choose one of the best combi boiler of 2025 options on the market.
It’s also important to note that the exact cost of getting a new boiler can vary depending on the complexity of the installation and whether you require additional parts. At the same time, any gas boiler installation in St James's will cost more as it will require a connection to the gas main.
When it comes to energy efficiency, combi boilers are the best option. Even though they are compact, they can supply a small household’s taps and radiators without wasting much fuel in the process. However, if your home has more than one bathroom and high heating demands, a combi boiler might not be the right choice. However, switching boilers to a combi may not always be the ideal solution. If you have higher water demand, a combi will not be the most viable solution. Similarly, while electric combis have very high efficiencies, this may not necessarily mean lower costs as electricity per kilowatt-hour (kWh) can be more expensive than gas in St James's.
A system boiler is more suitable for homes or facilities with higher hot water demands. They are ideal for running multiple hot water taps and showers. System boilers, along with conventional boilers, take up more space than combi boilers. This is due to the need for storage vessels, since they do not provide on-demand hot water. System boilers can be powered by various fuel sources, but the most common choice is natural gas. They can also use LPG (liquefied petroleum gas) or electricity as the energy source.
Compared to combi or system boilers, conventional boilers take up the most space in your home. This is because they require more additional components in order to operate. You will need enough space to house the boiler unit itself, as well as a hot water cylinder and a water storage tank. Conventional boilers can run on various fuel sources, including natural gas, oil, or electricity. When it comes to boiler replacements in St James's, swapping a conventional for other types is easier than installing one (due to the need for the extra elements and pipework that old heating systems require).
If you’re interested in a highly-efficient energy system, you’ll want to give some serious thought to electric boilers. They have efficiency ratings of about 99-100%, indicating that very little fuel is wasted in the process of generating heat and hot water for your home. One of the primary advantages of an electric boiler is that they are highly efficient. Boasting efficiency rates of up to 99-100%, electric boilers waste very little fuel to warm up your home. However, electricity prices in St James's are currently higher than the cost of gas, so you’ll want to check how much you can save with an electric boiler if you’re considering having one installed.
Biomass boilers run on fuel such as wood chips, logs or pellets. Because of this, they are considered a renewable home heating solution that can help you reduce your home’s carbon emissions. While biomass boilers have several impressive advantages, it’s important to note that they are more expensive than any of the other boiler types. At the same time, they take up a lot of space in your home, as the boiler unit is quite large and the fuel needs to be stored in a dry indoor space.
The cost of a new boiler replacement ranges anywhere from £1,100 to £5,000. Whether your boiler replacement will be at the lower or higher end of this price range depends on the boiler you choose and the kind of boiler swap you need.
Replacing an old combi boiler with a new one costs around £1,500 - £4,500. Switching a combi with a system boiler is a bit more expensive, costing about £1,580 - £5,000. Finally, replacing a combi with a conventional boiler will cost you somewhere between £1,100 - £5,000. Be sure to keep these estimates in mind when deciding on your new boiler replacement.
Central heating system installation is influenced by multiple variables, requiring consultations with several Gas Safe certified engineers to determine the precise estimate. This often involves a time-consuming process spanning several days to identify a reliable engineer offering a suitable price. Fortunately, our service can expedite this procedure for you.
All you have to do is fill out a 30-second form and we’ll do the rest by reaching out to thoroughly vetted installers in St James's. We will then connect you with them, so that you can find the cheap boiler that meets all your requirements. Click the button below to get started and you’ll receive up to 3 free, non-binding boiler quotes.
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Numerous factors can determine the right boiler size for your home:
Bedrooms | Radiators | Bathrooms | Boiler size |
---|---|---|---|
1-2 | 0 to 10 | 1 | 18 to 27kW |
3-4 | 10 to 15 | 2 to 3 | 28 to 34kW |
5 or more | 15 to 20 | 4 or more | 35 to 43kW |
Of course, these numbers apply to the UK in general, so pinning down the exact boiler size for every St James's household can be difficult. As a rule of thumb, combi boilers are less useful for households with multiple bathrooms, as they produce hot water on demand and this stretches their abilities thin when several taps are operating at the same time.
For higher water flow rates at the expense of a bit of energy efficiency, both system and conventional boilers can do the trick. However, both of these require extra space for additional components like a hot water cylinder and a water storage tank. While they are more adept at providing water for homes with more elaborate needs, they could be less suitable for smaller homes with less space.
If getting a boiler installed seems like an expensive prospect, there are some grants that could cut the costs. The Boiler Upgrade Scheme (BUS), for instance, is taking applicants until 2028 and is geared towards taking inefficient boilers out and upgrading homes for new heating standards. If you have an old, inefficient oil boiler or gas boiler, you may be eligible for up to £5,000 to install a low-carbon heating system such as a biomass boiler.
It’s hard to decide when you should replace your old boiler or opt for boiler servicing. Even the strictest regiment of boiler maintenance can’t hold the inevitable at bay. As a general rule, here are a few signs you need to ditch your current heating system:
Here are some of the most highly-reviewed boiler manufacturers available in St James's. These prominent names all provide heating solutions across the UK and offer a variety of boiler models of different types and sizes. Many, if not all, of these brands provide extended warranties if the installation is conducted by a fully-qualified Gas Safe registered engineer.
1. Worcester Bosch
Trustpilot: 4.6 out of 5 | 44,955 reviews
2. Vaillant
Trustpilot: 4.2 out of 5 | 20,425 reviews
3. Ideal
Trustpilot: 4.8 out of 5 | 50,096 reviews
4. Baxi
Trustpilot: 4.6 out of 5 | 63,196 reviews
5. Viessmann boilers
Trustpilot: 4.4 out of 5 | 5,058 reviews
Whether you’re looking for a Baxi or a Worcester Bosch boiler installation in St James's, you’ll still need a pro with reliable credentials and good prices.
As a rule of thumb, when getting a brand new boiler you should ask at least 3 Gas Safe registered engineers. However, finding an engineer you can trust is harder than it seems, with the process often requiring multiple days of research and price comparisons. That’s why we offer a far better way to find the right boiler installer in St James's.
All you need to do is fill out a 30-second form and we’ll handle the rest. There are tons of trusted professionals in St James's who are up to the task of installing your new central heating system or replacing a boiler. Click the button below to get started and find the cheapest boiler installation in St James's from seasoned professionals.
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The boiler installation process can be summarised in the following steps:
To ensure that you are getting a safe and high-quality boiler installation or replacement, you will need to work with one of the best installers in your area. However, looking up installers and comparing their services and costs on your own can stretch on for hours or even days.
Instead of wasting your precious free time, let us help you get started in just 30 seconds. All you have to do is fill in our short form and we’ll connect you with up to 3 of the best boiler installers in your area. They will offer you quotes for a new boiler installation, so you can find the installer you want to work with and secure the best deal for your home at the same time.
Simply click below to request free, non-binding quotes now!
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A boiler (supply only) can cost between £500 and £3,000 usually. It’s important to keep installation costs in mind as well.
A boiler installation can cost between £1,000 and £1,500 to install, on average. What boiler installers cost can vary based on type, size, and the complexity of installation.
Worcester Bosch (Trustpilot: 4.6/5), Vaillant (Trustpilot: 4.6/5), and Ideal (Trustpilot: 4.8/5) are the best boiler brands according to reviews. They all provide boilers in a full range of sizes.
A £500 and £1,500 for installation and £500 and £3,000 for the actual boiler. Certain grants may actually make you eligible for a partial or free boiler installation
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