Boiler Replacement, New Boilers and Upgrades

new boiler replacement

No matter the make or model, a good heating system won’t last forever. Heating costs make up about half of what homeowners spend on their energy bills.

Your boiler must be running efficiently to keep those monthly payments low.

If you’re having issues with your current heating system, you may start to wonder if it’s cheaper to spend your pounds on boiler repairs, or if you could save more money choosing to replace it with a new boiler instead. 

At Boiler Central we are here to help you make a decision on whether a new boiler replacement is right for you based on your current model and property.

We offer the best boiler deals in the UK… Fact! Fixed prices online in just 20 seconds, installed next day if ordered by 3pm. To get a quote now, click here.

boiler replacement

If you decide to go with a replacement, we’ll help you finance by acting as a credit broker.

We offer payment and financing plans regulated by the Financial Conduct Authority.

Learn more below about how we determine the signs of an old boiler, types of replacement systems, information on the cost of boiler installation, and our financing options available. 

When should you replace your boiler?

With regular servicing, some models can withstand many years of use.

However, there are some circumstances where the overall cost of repairs determines that a new boiler installation is a must.

Here are some issues to look out for: 

  1. Your heating bills are suddenly more expensive with no explanation.
  2. Frequent issues require you to have it serviced more than once a year. 
  3. Your boiler and radiators are making unusual noises.
  4. Your boiler smells sulphurous when it’s on. 
  5. Your boiler leaks.
  6. Replacement parts are expensive and hard to find. 

If you’re experiencing any of these major issues, it may be time to say out with the old, and in with the new.

In that case, it’s time to call us for a replacement.

Boiler Replacement

What type of new boiler should you choose?

After you’ve decided a new model is right for you, make sure you consider what boiler will be most efficient for your home needs.

Replacement Boiler

The main things to factor into your decision are:

  • Hot water usage: Large families that use a lot of hot water will find a regular boiler more efficient. A home with fewer occupants will benefit from a combi boiler. 
  • Home size: Because combi boilers don’t require hot water cylinders, we can install in a home with less space.
  • Solar water heating compatibility: If you’re using solar water heating, it’s important to know that many combi boilers are less compatible and inefficient with this heating system.

Many old gas and oil models are just regular boilers with separate cylinders to store the heating and hot water.

When replacing these, you can keep the hot water cylinder to go with your new boiler installation, or choose a combi system which doesn’t require a cylinder. 

Here is some more information about the different boiler systems available:

Heat Only Boiler Replacement

Heat-only boilers are known as conventional systems. These models store hot water in a cylinder or storage tank.

Replace old boiler

A regular boiler produces hot water more efficiently than combi boilers.

The circulation pump is housed as an external component, along with feed and expansion tanks. 

These typically feature an on and off switch. This means you can heat the water in the storage tank when you know you’ll be using it. You’ll conserve energy when it’s not in use. 



  • Warm water isn’t available on-demand and may run out after extended use.
  • Because heat is lost over time in the cylinder, conventional models can be less efficient than combi boilers.

Combi Boiler Replacement

Combination, or combi boilers, are the most popular type of home boiler systems registered in England.

They provide a combination of instant hot water and efficient central heating.

When you request heated water, a sensor signals the boiler to burn fuel, either gas, electric, or oil. 


  • Gas combi boilers don’t require any external components, making it appear sleek and compact.
  • Hot water is available on demand without the use of cold water or a feed and expansion tank.
  • They are more affordable to install than regular models.


  • More internal moving parts means there are more potential malfunctions. These issues may be more expensive to fix than with a conventional boiler. 
  • Hot water from a combi boiler system can only support one user at a time. This makes combi boilers less ideal in a larger home. 

System Boiler Replacement

System boilers are known as closed vent boilers.

Upgrading boiler replacement

These are perfect if you prefer a heat-only boiler but would like less external components.

Like a combi boiler, these models have their external components built into the body of the heating system. 

System boilers contain a hot water cylinder, but the feed and expansion tanks are supplemented with an expansion vessel located in the new boiler.

This is where the circulation pump and the valves are housed. 


  • System boilers work well with large homes where heated water is needed for more than one task at a time.
  • They don’t require the space needed for a conventional new boiler.
  • System boilers are very efficient in areas with low water pressure.


  • They require space for the heated water cylinder.
  • Installation costs are higher than with basic combi systems.
  • They are less efficient than combi systems since they lose heat from stored water in the hot water cylinder.
  • One has to wait for it to heat up again after heated water has emptied from the cylinder. 

Boiler Replacement

What does it cost to replace a boiler?

New boilers are a great investment for your home.

We offer authorised and regulated payment options to make sure you can afford whatever new boiler you choose.

Based on the new boiler you’ve chosen and our intake evaluation, replacement costs will vary.

To give you an idea, in the UK a conventional gas boiler replacement plus thermostatic radiator valves will typically cost around £2,300 before factoring in additional individual radiators.

Click here to get a price on a new boiler in just 20 seconds.

How much does it cost to replace a combi boiler?

Combi boilers cost significantly less than regular models because these models are less complex.

However, the price of your combi replacement will depend on the labour required to fit in the model of your choice.

Financing Options

Replacing boiler

If you’re overwhelmed at the cost of your new boiler, don’t fret. There are many financial conduct options available.

We offer access to a new boiler with 0% interest-free financing, interest-bearing credit, and monthly payment options regulated by the Financial Conduct Authority.

Gas Safe Installation Guarantee

We use our vetted and trusted Gas Safe engineers to handle all of your boiler replacement needs, for safety, and for your peace of mind.

boiler replacement

In our busier months, some of our old boiler replacements are fitted by our trusted subcontractors.

We assure you that all of our engineers will perform with the utmost safety and professionalism.

Boiler Replacement

Are full boiler replacements the right option?

In most cases, yes!

No one wants to waste money on their gas bills with a boiler that is draining money when it’s on.

Most homes have their heating on throughout the winter months, so it’s best to get full boiler replacements ready for the coming winter. Get a quote on a new boiler, click here

New gas boiler offers

Everyone wants to get a offer on their new gas boiler, that’s why at Boiler Central we give you fixed prices online. They will not change even if we have to complete extra work on the day.

There are a wide range of new gas boiler offers, check out our new boiler deals blog to find the most suitable replacement for your UK property.

New Boilers for UK properties

We only install boilers in UK properties (excluding Southern Ireland)

This gives us nationwide coverage so that you can have peace of mind that if you order a new boiler in the UK, we can fit it as quick as next day.

Sounds good? To get a quote online now – Click here

Getting a new boiler

It couldn’t be simpler when getting a new boiler. Gone are the days where you have to call British Gas (who are around 3 times as much as us 😀 , seriously) who would send out a surveyor.

Well, we say surveyor… They are salespeople disguised as a surveyor!

Now you can order a new boiler from anywhere in the world as long as you have internet connection, from your phone, tablet or desktop computer.

What will replace gas boilers in 2025?

According to the Committee on Climate Change, approximately 14 percent of greenhouse gas emissions are emitted from our homes.

Upgrade old boiler

The primary source is from gas heating systems. Because of this statistic, it has been decided that after 2025, no new homes will be using the gas grid.

Eventually, we will replace with low-carbon energy options with high energy efficiency.

Many homeowners are wondering what these replacement options will look like.

Here are some of the many upcoming heating alternatives for an energy-conscious home:

Heat pumps

Heat pumps are one of the more commonly known replacements to gas heating systems.

Using a refrigerant, heat pumps absorb the natural heat that is found in the ground, water, or air. The refrigerant is compressed to increase the temperature, which is then used to warm the cold water.

When the water is heated, it is then pumped to your radiator and water taps.

Unlike a traditional boiler, heat pumps don’t need any gas or oil to run. Instead, they work by only using electricity and other natural, renewable energy sources. This results in no additional carbon emissions.

There are many advantages to using a heat pump.

A heat pump is more durable than a gas model. Some even offer cooling capabilities during the summer months in addition to the heat they provide in winter.

Electric boiler

An electric model works very similarly to a gas one. Instead of gas, it uses electricity to heat the water.

These are usually more compact than gas versions, whilst remaining just as efficient.

Like heat pumps, an electric model can’t be 100 percent CO2 neutral if it uses electricity produced from burning fossil fuels.

Options like using solar panels or other forms of renewable energy are available to reduce your electric boiler’s carbon footprint. 

Solar heating systems

Solar (thermal) heating systems reduce fossil fuel usage considerably, even though they don’t eliminate the use of gas.

Replacement Boiler (solar panels)

Unlike electric solar panels, thermal heating systems use heat from the sun to warm up your household water.

Using solar panels on the roof of your home, heat is absorbed and transferred to a tank similar to conventional boiler systems.

Contact us for a new boiler quote today!

If you’re beginning to notice major issues coming from your old boiler such as high power bills, unusual smells, or leaking units, it’s time to upgrade to a new model.

Using our online quotation system, answer 9 simple questions about your home and water usage to find the fuel and model option that’s efficient for you.

Once we’ve received your information, we’ll act as a credit broker to help you finance your boiler replacement.

We’ll provide a budget as well as other various model options that are right for you.

Get a new boiler quote now – click here

Boiler Replacement

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