The cheapest boiler to install is a gascombi boiler.
Boiler brand, type, fuel type and labour fees will impact the overall cost of a boiler installation.
To get the best deal for cheap boilers, we recommend comparing multiple quotes.
When it comes to finding a cheap boiler in the UK, you want to ensure that the boiler you choose is still good value. With so many different brands out there though, it can get overwhelming trying to find the best possible boiler replacement deal.
To make things more complicated, there are many factors, which impact new boiler costs. To help you get started, we've researched the best cheap boilers in the UK in 2024. Continue reading to discover our picks of the highest quality and most reliable, affordable boilers.
If you're simply looking for a cheap boiler replacement, that's something we can help with. You can quickly get free boiler quotes with Boiler Guide.
Just fill out our 30-second form, and we'll connect you with up to 3 heating engineers near you. This way, you will get the best boiler deals and avoid the risk of being overcharged.
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Cheap boiler installation and replacement: costs and process
For homeowners seeking a cheap boiler installation, the cost and process will vary based on individual needs. Some are balancing the need to meet their hot water demands without breaking the bank. Others are searching among the leading brands to find an energy-efficient and cheap boiler replacement.
Whatever your situation is, here are some basic factors that influence the boiler cost:
Boiler brand: Prices can range from £500 to £4,000, depending on the quality and reputation of the brand. Opting for a lesser-known boiler brand can help save money as long as the quality and warranty meet your needs.
Boiler type: Cheap combi boilers are the easiest to find as they are generally the most affordable, with prices starting from £500. System and regular boiler prices start at £600 and £700, respectively. This is because these boiler types are more complex and powerful, to serve larger home heating demands.
Fuel type:Gas boilers tend to be the most affordable, while oil boilers are generally more expensive. This is due to the difference in size, components and construction.
Installation: The total cost (including boiler, labour, and extras) will be between £1,500 and £5,000.
Labour: Straightforward installations (like switching an old combi for a new one) cost around £300 per fitter per day. Complex jobs will take longer and cost more.
Extras:Upgrading your boiler type (e.g. from regular to combi) will increase the cost, depending on the boiler brand you choose. Additional costs like pipework, thermostats, or system flushes may also apply.
Cost-saving tip: Consider multiple quotes from reputable installers and look into government schemes to get the best boiler deals. For example, the Boiler Upgrade Scheme and ECO4 can offer grants of up to £7,500 to help offset the cost of a new low-carbon heating system, or fund those on lower-incomes to install a new boiler (eligibility criteria apply).
Knowing the installation process will help you navigate the costs and timing involved so you can make a more informed decision about your boiler choice.
Assessment: A heating professional will visit your home to understand your needs (property type, size, location) and recommend a suitable boiler size and type within your budget.
Getting a quote: You’ll receive a detailed quote outlining the boiler cost, labour charges, and any additional work or components needed.
Installation: Depending on complexity, installation can take as little as 4 hours or as long as 3 days. Replacing a combi with a combi is quicker, while back boiler conversions take longer.
Additional work: New pipework, boiler relocation, or adding new components will be factored into the process and quote.
It's worth noting that while a cheap upfront cost might seem appealing, you also need to consider long-term savings. The most efficient boiler can save you more money on energy bills in the long run compared to a cheap yet inefficient boiler.
To get the best boiler for your home, you should consult a registered heating engineer before making any purchases. However, finding trustworthy local installers can be a hard task on your own.
Avoid hours of scrolling the web, reading reviews and sending contact forms. Instead, use our quick and easy form! It takes just 30-seconds.
We'll connect you with up to 3 registered, vetted installers who can offer you free, non-binding quotes. You can get advice on your new boiler and find the best deal for your budget.
To begin with, we’ll point out that buying the cheapest boiler isn’t always the best course of action. Anyone considering a budget boiler should first browse or ask an installer: “How long does a cheap boiler last?”
The average lifespan of boilers in the UK is between10-15 years. However, a boiler’s actual lifespan depends on its quality, type, and maintenance.
Cheaper boilers may need frequent repairs and replacements as they are often built with less durable materials. In contrast, more expensive boilers, tend to use superior parts with more rigorous quality control measures, leading to a longer life span.
Prices may also reflect warranty length, meaning the more you pay, the better protected your boiler will be. In terms of quality, much like any appliance purchase, you tend to get what you pay for.
Having said that, there are many reliable and affordable boilers available on the market, and many are manufactured by leading boiler brands.
In the rest of this guide, you’ll find the best cheap boilers to buy in 2024 from the best boiler brands on the market, what to look out for when buying cheap boilers, and the best strategy to purchase budget boilers.
Cheap electric boiler brands
Electric boilers are a great solution for homes not connected to the gas grid, and some affordable, high-quality brands offer them. These include Heatrae Sadia, Electric Heating Company, and Strom.
Typically, an electric boiler can cost anywhere from £600 to over £4,000. However, we have found some models on the lower end of the price range, in the table below.
Manufacturer
Boiler Model
Output (kW)
Average Price (Exc. installation)
Heatrae Sadia
Amptec
4 – 9kW
£650 – £940
The Electric Heating Company (EHC)
SlimJim
4 – 14kW
£690 – £800
Advance Appliances
eGlow
6 – 12kW
£870 – £1,050
Elnur
Mattira MAS
3 – 15kW
£840 – £1,030
Prices are estimates only and are subject to change.
While it's possible to find a reliable, cheap electric boiler, there are considerations to be made about the running costs. Powering a boiler on electricity can cost you 3 times more than a gas boiler.
However, if you are looking for an off-grid solution and wish to use electricity, you could save money by choosing an Economy 7 or Economy 10 energy tariff. This tariff will cut down your overall home energy spend by offering cheaper electricity during off-peak hours, making it more financially viable to run an electric boiler.
Cheap gas boiler brands
It's estimated that almost 80% of households in the UK rely on gas boilers for their central heating and domestic hot water. This is because natural gas remains one of the cheapest fuel sources.
Leading brands Worcester Bosch, Vaillant, Baxi and Ideal Heating provide some great, highly-efficient choices, models with different sizes and generous warranties – all within a budget of £1,000 – £2,000. We listed some of the cheapest gas boilers in the table below.
Manufacturer
Boiler Model
Output (kW)
Average Price (Exc. installation)
Worcester Bosch
Greenstar 2000
25 – 30kW
£840 – £1,000
Vaillant
ecoTEC pro
24 – 30kW
£930 – £1,800
Ideal Heating
Logic Max2
24 – 25kW
£1,170 – £1,460
Prices are estimates only and are subject to change.
Gas boilers produce over 92 million tonnes of carbon dioxide per year. Despite this, gas boilers still dominate the market.
To tackle this, leading brands are now focused on producing reliable and energy-efficient models to encourage more sustainable heating practices. With efficiencies of up to 94%, new gas boiler models produce less waste and fewer emissions than ever before.
Cheap LPG boiler brands
Another great choice for homes unable to connect to the gas grid is to use LPG (liquefied petroleum gas), which comes in tanks and can be bought in bulk. Nearly all major boiler manufacturers have dedicated LPG models, or offer gas models which can be converted to LPG – making it an even more accessible option. We've listed some fantastic LPG models, along with their average costs, in the table below.
Manufacturer
Boiler Model
Output (kW)
Average Price (Exc. installation)
Vokera
Vibe MAX
26 – 30kW
£630 – £820
Ferroli
BlueHelix HiTech RRT
24 – 34kW
£815 – £970
Baxi
400 2.1 LPG
24 – 36kW
£850 – £900
Please note some of these models are LPG capable when using a conversion kit. Prices are a guideline only and are subject to change.
Cheap combi boiler deals
Combi boilers are often the cheapest type of boiler and tend to be popular because they’re space-efficient and don’t need to be installed alongside any tanks or cylinders.
Combi boiler prices start at around £500 and can rise to over £3,000, excluding installation costs.
One of the cheapest combi boilers available in the UK is Vokera's Vibe MAX C26 combi boiler, which costs approximately £625 (exc. installation).
So, how do you find deals for cheap combi boilers? Finding and comparing quotes can take hours of making calls and scrolling through reviews.
With Boiler Guide, you can streamline this process! By filling in our 30-second form, you can get up to 3 free quotes from local installers in your area. It's completely free and non-binding, so you can find the best deal for your budget.
If you’re looking for thebest combi boilers under £1,000, you’re in luck! We've found some of the best on offer among the top-rated manufacturers. We've listed these in the table below for you to compare.
Best combi boilers under £1,000 overview
Brand
Vokera
Worcester Bosch
Baxi
Model
Vibe MAX 26C
Greenstar 2000 25kW
600 Combi 2
Output (CH)
20kW
24kW
20kW
Output (DHW)
25kW
24kW
24kW
Efficiency
93%
94%
94%
Warranty*
5 years
7 years
7 years
Average Price (Excl. Installation)
£625
£880
£985
*Terms apply. CH = Central heating. DHW = Domestic hot water. Prices are estimates only and are subject to change.
Best combi boilers under £2,000
If you have a slightly larger budget, we’ve also found some of the best budget combi boilers under £2,000. These boilers can offer a higher output size than the slightly cheaper ones but still provide the best value for their price.
Best combi boilers under £2,000 overview
Brand
Vaillant
Viessmann
Worcester Bosch
Model
ecoTEC Plus 832
Vitodens 050-W
Greenstar 8000+
Output (CH)
26.5kW
25kW
29.6kW
Output (DHW)
32.6kW
29.6kW
32kW
Efficiency
94%
92%
94%
Warranty*
5 – 10 years
7 – 10 years
8 – 12 years
Average Price (Excluding Installation)
£1,800
£1,200
£1,500
*Terms apply. Prices are estimates only and are subject to change.
Cheap system boiler deals
The cost of system boilers, on average, ranges from £600 to £3,500 depending on the fuel type (excluding installation costs).
System boilers are ideal for households that have a high hot water demand because they work alongside an unvented cylinder that stores the hot water. This is perfect for homes with multiple bathrooms.
For a household with up to 10 radiators, one of the cheapest system boilers is the Glow-Worm Energy7 12S system boiler, which costs around £945. Knowing what boiler size you need for your home is important, so be sure to get advice from a trusted installer.
Seeking expert advice also means you can get accurate and reliable prices to compare and avoid overpaying.
By using our free quote form, we can help get you up to 3 free comparison quotes from installers in your area – and it’s much faster than spending hours calling endless companies yourself!
Looking for a cheap system boiler can be difficult, with many top brands requiring a larger budget. To help you find some of the best system boilers under £1,000, however, we've done the research for you! In the table below, we've compiled the best value system boilers at an affordable price.
Best system boilers under £1,000 overview
Brand
Glow-Worm
Vokera
Alpha
Model
Energy7 12S
Easi-Heat i 20S
E-Tec 20 NXS
Output (CH)
12kW
20kW
26.1kW
Efficiency
94%
90%
90%
Warranty*
5 years
5 years
7 years
Average Price (Excluding Installation)
£945
£630
£960
*Terms apply. Prices are estimates only and are subject to change.
Best system boilers under £2,000
Most system boilers will cost more than £1,000, but you can still get a great deal if you are able to spend slightly more money. For under £2,000, you can get lengthier warranties and choose brands with fantastic reputations. Below, we've compiled some of the best system boiler deals under £2,000 for you.
Best system boilers under £2,000 overview
Brand
Ideal Heating
Baxi
Worcester Bosch
Model
Logic MAX S24 System²
Baxi 824 System 2
Greenstar 8000+ 30kW System
Output (CH)
24.2kW
24kW
30kW
Efficiency
91%
94%
94%
Warranty*
10 years
10 years
12 years
Average Price (Excluding Installation)
£1,350
£1,300
£1,600
*Terms apply. Prices are estimates only and are subject to change.
If your budget is larger than £2,000, then you may be interested in our guide on the overall best system boilers in 2024.
Cheap regular boiler deals
Regular boilers, also known as conventional or heat-only boilers, range from £700 to £3,500, excluding installation costs.
Typically, a cheap regular boiler from reputable brands starts at around £900. For instance, Worcester Bosch's 12Ri, costing £997, is among the cheapest boilers.
The total cost of getting a regular boiler will increase when the installation is considered. These boilers need to be installed with a hot water cylinder and cold water feed tank. This is why it’s only recommended that you install a regular boiler if you are replacing an existing one.
A boiler engineer can give you more accurate quotes for your total boiler cost, including the installation and any additional parts.
To get reliable quotes for a cheap new boiler, you could spend hours searching for them yourself, wading through reviews and waiting weeks for call backs – or, let us help you instead!
We can get you up to 3 free quotes so that you can easily compare them. Just fill out our 30-second form and we’ll connect you with trusted installers near you.
It's completely free, with no obligations attached. Simply click below to begin.
We've found some of the best regularboilersunder £1,000. These provide the best value for their price and can be compared in the table below.
Best regular boilers under £1,000 overview
Brand
Worcester Bosch
Glow-Worm
Baxi
Model
Greenstar 12Ri
Easicom3
415 Heat
Output (CH)
12kW
25.2kW
16kW
Efficiency
92%
94%
93%
Warranty*
10 years
5 years
5 years
Average Price (Excluding Installation)
£997
£750
£930
*Terms apply. Prices are estimates only and are subject to change.
Best regular boilers under £2,000
For increased performance and longevity, you might want to spend a little more. To help you decide, we've compiled some regular boiler choices from the leading brands, which cost under £2,000. Below, you can compare their features and average prices.
Best regular boilers under £2,000 overview
Brand
Viessmann
Vaillant
Ideal Heating
Model
Vitodens 100-W 25kW (B1GA)
ecoTEC plus 424 24kW
Logic MAX Heat² H30 30kW
Output (CH)
25kW
25.7kW
30.3kW
Efficiency
92%
94%
91%
Warranty*
10 years
10 years
10 years
Average Price (Excluding Installation)
£1,300
£1,280
£1,450
*Terms apply. Prices are estimates only and are subject to change.
Cheapest boiler to install
The cheapest boiler installation will typically be a like-for-like replacement. This is because less additional work is usually required, and installation can take less time, reducing labour costs.
The boiler type will also impact costs. For example, a gascombi boiler is much smaller and quicker to fit than a system boiler (which requires fitting an additional hot water storage tank). Choosing a gas boiler is also usually cheaper than an oil boiler.
To get an overview of the cheapest boiler to install, we've compiled costs for like-for-like replacements below:
Depending on your circumstances, your installation could also incur additional costs for parts or maintenance. These could include a full system clean, adding a filter, or fitting a new flue pipe. Costs for extras can be between £50 and £300.
You may also be interested in alternative or low-carbon heating systems, such as an air source heat pump or solar thermal panels. To help you compare these costs, we've detailed some price points below for different heating options:
Heating System
Installation Cost Estimate
Combi boiler
(like-for-like replacement)
£1,500 – £4,500
Biomass boiler
£4,000 – £21,000
Air source heat pump
£2,400 – £14,050
Ground source heat pump
£13,200 – £49,000
Cheapest boiler to run
One of the cheapest new boilers to run is a highly efficient gas combi boiler. Gas is currently one of the cheapest fuel options, and modern combi boilers offer efficiency levels of up to 94% – this means for every unit of fuel you burn, the boiler converts nearly all of it into usable heat (with only 6% waste).
So, you’re not only paying for the least expensive fuel but you're also getting the most efficient use out of every unit – saving you money. The less fuel you waste, the less energy you need to use to heat your home.
Understanding fuel costs can help you estimate your potential annual heating running costs, per boiler type.
Fuel Source
Tariffs
Estimated Running Costs
Gas
6.24p/kWh
£717
Oil
6.8p/kWh
£782
LPG
8.7p/kWh
£1,000
Wood Pellets (Biomass)
8.6p/kWh
£989
Electricity
24.50p/kWh
£2,817
Figures assume a home heating energy use of 11,500kWh annually. Based on Ofgem’s typical annual consumption values (TDCVs) and energy price cap tariffs (Oct-Dec 2024). Prices are estimates only.
How can you find the best cheap boiler?
When trying to find the best cheap boiler, it is good to know what makes one boiler more expensive than another. There are several factors that affect the price:
You can save more money by arranging a cheap boiler installation during the summer. Heating engineers tend to be less busy during the summer months, which can reduce costs.
Plus, replacing your boiler when you're less likely to need heating will reduce disruption and you'll have a new, efficient heating system in place before winter comes around.
In addition to these factors, you also need to consider how and where you’re looking for cheap boiler prices. You may be eligible for a government boiler grant that can help cover some, if not all, of the cost. Alternatively, look for boilers on a 0% finance option to save on your boiler investment.
An often overlooked strategy to find the best cheap boiler deals is to compare prices from up to 3 boiler engineers near you. By comparing quotes from heating engineers, you can be confident that you're getting a fair price.
If you’re looking for reliable quotes, we can help save you time and give you advice by providing you with up to 3 free quotes from local heating engineers.
Combi boilers tend to be the cheapest type of boiler as they are compact and don't require any extra tanks or cylinders. They are also the most popular boiler type in the UK.
Are boilers cheap?
Cheap boilers are possible to find, even from the big brands. Some of the best cheap boilers start from £500 – £800, but installation fees and extra parts can add up to £1,800 to these costs.
How much is the cheapest combi boiler?
One of the best cheap combi boiler deals that you can find starts at £630, for a good quality unit. The price of a combi boiler can range anywhere from around £500 to £4,000 depending on the manufacturer and size.
Which is the cheapest boiler to run?
Defining the cheapest boiler to run usually depends on the boiler’s efficiency and fuel type. Since gas is currently the most affordable fuel, highly efficient gas boilers are considered the cheapest boilers to run.
About the author
Hannah Maza
Hannah is our resident home heating expert with experience writing about cost-effective and energy-saving solutions. She spends her time researching UK energy trends, the future of heating, and renewable energy as the landscape changes.
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Combi boilers are often the cheapest type of boiler and tend to be popular because they’re space-efficient and don’t need to be installed alongside any tanks or cylinders.
