Cheap Boiler Installation: Affordable Boilers In 2024

Combining the supply and installation costs of a new boiler can become a daunting cost for many. That’s why, when upgrading your boiler or heating system, keeping to an efficient budget can help to limit unnecessary costs. While new boilers can have upfront costs of up to £3,500, this article is here to help you find the best cheap boiler for your home.

Of course, new boiler costs don’t stop at the initial purchase, which is why we’ve also outlined some key installation and running costs for you to keep in mind. We’ve compared these with other heating systems and outlined some tips to find cheap boiler installation deals. This way, you can truly know where your money is best placed.

To make the best choice, and to ensure a professional installation, consulting a registered heating engineer in your area is crucial. Finding a qualified installer can take days of research, assessing services and comparing prices.

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To find the best and cheapest boiler combination, you must also consider some key indicators besides a reasonable price. These include:

Discover the best cheap combi boilers, system boilers, and conventional boilers further on in this article.

When considering the best boiler deals, it’s important to consult a professional heating engineer for peace of mind that your choice of cheap boiler will perform at its best.

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By filling in our simple form, you can get up to 3 free quotes from our network of trusted installers, who are fully registered and vetted by us.

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Combi boilers are best suited to small homes and flats since they are compact. From one unit, they provide heating and hot water at local mains pressure. 

Combi boilers have the biggest selection of affordable options under £1,000, as listed below. This might help explain their popularity among British homes. 

Combi boilers offer two outputs, one for central heating (CH) and one for domestic hot water (DHW). Providing hot water requires more power from the boiler so its output will be higher, making it a better indicator of the boiler's overall size. 

Below is a table of cheap combi boilers for sale in the UK.

For combi boilers under £1,000 you have a lot of great options to choose from. The brand that dominates in this category is Baxi, offering solutions that can fit into most UK homes.

System boilers tend to start at higher price points than other boiler types, so the range of system boilers from the top manufacturers under £1,000 is quite limited. That’s why we’ve included some models up to £2,000, for those who would like a system boiler and are willing to pay more. 

These boilers have heating outputs available from 12kW to 35kW. This makes them suitable for homes with between 8 and 20 radiators and multiple bathrooms. Smaller homeowners should bear in mind that they will also have to find space for the additional hot water cylinder.

Conventional boilers (aka regular or heat only) are the oldest of all the boiler types and are best suited for larger homes. These boilers will require a hot water cylinder, as well as a cold water feed tank. This tank feeds mains water to the rest of the system to be heated and distributed.

Due to these additional elements, smaller homes might struggle to find the space for a conventional set up. Therefore, it is always recommended that you only choose a conventional boiler, if you are replacing an existing one. Smaller homes, looking for a modern boiler should consider combi or system boilers, as they can provide the same amount of energy, but take up far less space (they are also quicker and cheaper to install).

With that being said, homes with conventional boilers already in place can find affordable like-for-like replacements if they don't wish to switch to a new boiler type. With this in mind, we’ve provided a range of the best conventional boilers available on the market below. However, we have included prices up to £2,000 for added choice.

There are many options for cheap conventional boilers, which can make it difficult to make a decision. Use our table to compare your options and consult an installer about the best solution for you.

The average cost for boiler installation can be anywhere between £1,500 and £3,000, but can reach up to £5,000. This puts the average price range for supply and installation between £2,000 – £6,500+.

The cheapest boiler installation will require the least parts and labour and will take the least amount of time. This makes a like-for-like boiler replacement one of the cheapest heating systems to install for an entire property. 

The most complex installations will be at the higher end of this price range, where you are switching boiler type or moving your boiler to a new location.

Besides cheap gas boilers, you may also be considering some alternative heating systems. Below we’ve provided the price ranges for these, which include supply and installation. 

Alternative options for heating:

Alternative options for hot water:

Alternative options for heating and hot water: 

Among these options, electric storage heaters are the cheapest to install for an entire property. Infrared panels could also be considered the most affordable, depending on how many rooms you wish to install them in, and how much they cost within the price range we've provided.

The price of a cheap boiler installation depends on a range of factors, such as the time of year when purchasing a boiler, and the complexity of system and installation job. Put simply, the easier the boiler installation, the less parts and labour it will require. That’s why one of the best ways to limit mounting costs is to install a replacement boiler of the same type, in the same location, rather than switching to a different type.

Beyond the initial costs for supply and installation, it’s also important to consider the running costs of new boilers and other heating systems. 

Under the current energy price cap, our research shows that natural gas remains the cheapest energy source to fuel your heating system, at 6p/kWh (kilowatt-hour). 

One of the cheapest boilers to run is the Baxi 600 Combi 2 (24kW) boiler (aka Baxi 624). It has an impressive 7-year parts and labour warranty and an impressive price-quality ratio (at approx. £930, it’s one of the best cheap combi boilers on the market). With an efficiency rating of 94%, pairing this model with a cheap fuel type like natural gas will have a noticeable impact on your heating bill. 

For a more environmentally friendly option, you could also choose an electric boiler. However, as electricity costs are higher than those of gas, you would be spending more to keep your boiler running.

To determine which heating system is cheapest to run, there are many variables to consider. 

These include the price of fuel under the current energy price cap, in pence per kWh. As well as fuel efficiency, which affects running costs since the most efficient system will use less fuel. Gas and electricity also have a standing charge of above £300 over the course of the year. 

With this in mind, we’ve calculated the annual running costs of various types of heating in the UK. These costs relate to the annual average heat demand of 11,500kWh (2-3 bedroom house), according to the latest Typical Domestic Consumption Values, provided by Ofgem. 

If saving on energy is your priority, other alternative energy systems may be worth considering as well. For example, in the case of heat pumps, despite electricity costing more per kWh, the exceptional energy efficiency of these energy systems (300-400%) comes out to 3-4 times the heat produced per kWh, resulting in less annual costs to run than traditional gas heating, despite costing more per kWh. Therefore, when comparing heat pumps vs boilers for the average household, a heat pump will offer average annual savings of up to £550 compared to gas boilers. 

There are various ways to reduce your overall spending when it comes to finding the best value boiler supply and installation costs. We’ve highlighted some of these below: 

Sourcing multiple quotes takes considerable time and effort with so many options available to you. Avoid spending hours of your time researching boiler prices and best boiler deals. Instead, let us do the leg work for you!

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