Are Back Boilers Now Illegal? Free BackBoiler Conversions
Are Back Boilers Now Illegal? Free BackBoiler Replacement 2023
Old Back Boilers are not illegal!
Old Baxi Bermuda back boilers with gas fires as central heating systems are not illegal too.
You can continue to use them as long as they are still working correctly.
You can opt to replace it with a new back boiler but they are considered old fashioned now and are very hard to source.
We recommend you see if you are eligible for a free back boiler replacement grant.
Back Boiler Replacement 2023 – We Do It For Free!
This is no drill!
Do you have an old Baxi Bermuda Back Boiler that is currently heating your home?
If you are thinking about replacing your old Back Boiler behind the fire , this post is for you.
We take you through the process and inform you of the Free Back Boiler Grants that are still available to people who receive a benefit or on a low income.
Back boiler replacements are well recommended if you are still using one to heat your home because of the benefits you will receive when switching to a modern condensing boiler.
This blog will explain what a back boiler is and how we can offer you back boiler replacement for 100% FREE!
What Are Free Back Boiler Removal Grants?
The government are now offering 100% FREE grants to remove your old Baxi Bermuda back boiler and replace it with a combi boiler on the wall.
The boilers fitted include Ideal – Worcester & Baxi.
As old backboilers are very expensive to run , the Government has allocated millons of £ to help people convert old back boilers to a combi 100% Free Of Charge
This will be a much better option for you than having a backboiler replacement and if you are on a low income, you can get it for free!
This Free Back Boiler Grant scheme is for home owners only.
Reasons Why You Should Replace Your Back Boiler
- Grants are Available 100 % Free
- Back boilers have expensive running costs that waste 30p per £1 you spend on energy.
- Back boilers are significantly less energy efficient and waste up to £500 every year on energy bills.
- Servicing & Repairing back boilers is now difficult and expensive due to
- Repairing back boilers is very expensive as very few companies produce back boiler parts.
- Modern boilers are more energy efficient than back boilers and will lower your energy bills.
- Old back boilers can be very dangerous with reports of explosions not being uncommon.
- Back boilers are no longer installed, due to government safety regulations.
- Back boilers are hard to repair, due to the lack of spare parts.
- The constant expanding and contracting of a back boiler can cause structural problems to your home.

Replacing a Back Boiler – Your Options For 2023
We recommend you :
- See if you are eligible for a free government grant to replace it with a combi boiler.
- Replace it with a new Baxi Bermuda back boiler SEDBUK efficiency rating of ‘A’ which are still available.
- Remove the back boiler and replace with a modern combi boiler privately.
Replacing A Back Boiler With A Combi Boiler
Removing your back boiler and replacing it with a combi boiler is ideal for smaller type homes.
You will get hot water on demand and central heating from the same unit without needing an additional tank.
As a result, they usually aren’t powerful enough to heat large homes with high hot water and heating demands.
Replace Back Boiler with a System Boiler
Large homes with two or more bathrooms, should consider replacing your back boiler with a system boiler.
System boilers can meet higher water demands as they source water from the mains supply to heat the central heating and hot water to store in a hot water storage tank.
This means there is more hot water available on demand.
Replace Back Boiler with a Regular Boiler
Regular boilers are also an option as a back boiler fire replacement for homes with multiple bathrooms and high demand for heating and hot water.
Regular boilers require a tank in the loft to supply cold water and a large hot water storage tank to store the heated water for your taps.
Replace Back Boiler with a Heat Pump
If you’re looking for a back boiler replacement that is more environmentally friendly, you should consider a Heat Pump. There are currently grants available via The Boiler Upgrade Scheme.
Back Boiler Removal Costs
The cost of removal for an old back boiler will vary from home to home.
If you already have a central heating system installed and just want to remove the old back boiler from behind the chimney breast, the cost is likely to be between £700 and £1000.
This is a ballpark figure for the job and usually takes a day to fit.
This price will includes the removal of the back boiler, disposal and capping off the old pipework.
This price should include making good and any redecoration work needed for the chimney breast.
What is a Back Boiler?
Back boiler units (BBU), also called solid fuel back boilers or gas back boilers, are the older types of heating system that was fitted in homes in the 1960s -1980s. Backboilers were designed to fit behind a living room fireplace in order to save space.
They are called back boilers because they are mounted as a back boiler fireplace or a back boiler stove and use the heat from the fire to provide central heating and domestic hot water.
They are considered outdated and inefficient but are still found in 5 % of UK homes. The 2005 Building Regulations state that installing a back boiler is illegal in the UK.
Back boilers were very popular in the 60s and 70s but are gradually being phased out in favour of combis. Baxi Bermuda -Parkray and Rayburn boilers were the main names with this type of heating.
The open fire would heat the water in a tank behind the fire and this heated water would rise into a cylinder connected to it upstairs which would be used by the home occupants for washing etc.
Whilst many homes still have back boilers as their main source of heating, they are no longer readily available for replacement due to their in efficiency and are usually replaced with a gas combi boiler.
It is very difficult now to replace a back boiler with a similar type as back boilers are no longer manufactured apart from the Baxi Bermuda Condensing Boiler.
PLEASE NOTE FOR SAFETY – If you do upgrade to a combi boiler , we recommend that the old disused back boiler ( in situ behind the fireplace ) should still be removed .
Are Back Boilers Efficient?
Not Really.
An old back boiler usually is around 60 -70% efficient which compared to modern condensing boilers which are 92-94% energy efficient.
Back boiler fire systems are now replaced by a condensing boiler or the new heat pumps.
How Does a Back Boiler Work
Gas fire back boilers operate by using the heat generated from the open fire in the fireplace or stove to heat water for your central heating and hot water use.
The boiler itself sits behind a fireplace or stove and is connected to a hot water cylinder. The water is heated up by the back boiler and is stored in the hot water cylinder, to be sent to your taps and shower. The boiler will also heat water in a coil to send around the radiators.
Is it worth replacing back boiler?
Can You Sell A House With A Back Boiler?
Back Boiler Replacement Cost
Replacing your old back boiler with a combi boiler is likely to be an expensive job. The cost of replacing a back boiler is between £2,500 and £4,500.
Although this may seem to be a costly expense, you should bear in mind that there are potential savings to be made with a new and energy-efficient combi boiler.
Not to mention the quality of heating and hot water that combi systems provide. You need to decide whether you should go with a new back boiler or go for an upgrade to a combi boiler. We recommend you have the backboiler decommissioned and upgrade to a combi boiler.
Back boiler replacement costs so much because you have to thoroughly remove the back boiler and install a completely different boiler elsewhere in your home.
This involves a lot of work, especially running new pipework for mains gas and distribution pipework too
The most popular replacement is the modern combi boiler which will give you hot water on demand. You should expect the whole job to take 2 – 3 days.
Extra Costs
Replacing a back boiler is a big cost . Plan your install and see if there will be extra charges.
- A system boiler will need a hot water cylinder in the airing cupboard and a cold water storage tank in the loft plus further pipework so will be an extra £1000.
- The location of the boiler can affect the cost especially if in an airing cupboard as the flue will need to exit the roof.
- Choose the size of the boiler
- A combi boiler will also save you from the added cost of having a cold water storage tank in the loft as well as a hot water cylinder in the airing cupboard
Making Good After Back Boiler Removal
Removing a back boiler will cause some damage to the existing hearth and fireplace surround.
You will need to upgrade the fireplace with a new surround and electric or gas fire or use it for a real fire.

Are Back Boilers Still Available To Buy?
Yes The Baxi Bermuda BBU HE Boiler is a fully condensing back boiler which has been designed for homeowners looking to replace their old back boiler with a more efficient system.
UK government regulations state that all boiler systems must have a minimum of 86% efficiency, so most models of back boilers are no longer manufactured .

Are Replacement Back Boilers Still Available?
Back boilers are no longer being manufactured by most companies apart from the Baxi Bermuda BBU HE See Here
Installation of this Back Boiler is easy because it has been designed to be used with the existing pipework of a home.
How Much Does A Replacement Back Boiler Cost?
Please see our Back Boiler Removal Grants Page Here or make an application below.
Why Should You Upgrade Your Back Boiler?
✅ The Government Is Giving 100% Grants To Upgrade To A Combi
✅ If You Qualify For A Grant Your New Combi Boiler Will Be 100% FREE !
✅ This Grant Is Worth Over £3000 If You Had To Pay Privately
✅ You Will Reduce Your Energy Bills By Up To £300 Per Year
✅ You Will Add Lots Of Value To Your Home
✅ You Can Have An Up To Date Gas Fire Fitted Which Will Be More Efficient
When did back boilers cease to be fitted in homes?
In 2005 Building Regulations requirements changed and backboilers were no longer allowed to be fitted in new build houses.
This was down to backboilers having very poor efficiency and safety issues.
Can you sell a house with a back boiler?
It is not illegal to sell a house with a back boiler fitted.
We do recommend you have it serviced prior to sale and provide a gas safety certificate to the new owner.
Can you rent a house out with a back boiler?
As long as your property is a minimum Energy Performance Certificate rating of E , you are still allowed to rent out homes with a back boiler fitted.
If Below E it will be your obligation to upgrade this for your tenant, or before you let out the property to new tenants.
A gas Safe Cert will also be required
Are back boilers expensive to run?
Back boilers are a very old form of heating and are usually around to be 70% efficient compared to new boilers which will give you over 90% efficiency.
They can be costly to maintain too with spare parts getting harder to find which will make them more expensive.
Should you replace a 20 year old back boiler?
A central heating system using a backboiler behind the fire that is over 20 years old is likely to be made significantly cheaper to run by replacing with a condensing boiler.
You will probably save over £200 per year by replacing it.
Good idea to see if you are eligible for a grant.
Can a back boiler explode?
If a fire is lit in front of a redundant back boiler that has been left in a sealed condition, it can heat up and the internal pressure can cause the boiler casing to explode.
We recommend that when a back boiler is decommissioned , the whole system should be drained and all redundant pipework removed.
All properly decommissioned back boilers must be fitted with a safety valve to regulate pressure build up.
The back boiler if possible should be removed too.
How messy is removing a back boiler?
The back boiler, it’s flue and gas fire – all will be removed unless you want to keep the back boiler fireplace.
Removing the gas fireplace and replacing it with an electric fire could cost you more in the short term but less in the long term.
So, creating a mess is normal while removing a back boiler.
How much does it cost to service a back boiler?
A service of a boiler, gas fire and hob is likely to be in the £100-£125 range.
A boiler service should cost £70-90 (depending on where in the country you are), and that includes cleaning out a magnetic system filter (if you have one).
What Different types of Back boilers Are In Homes?
Gas fire with back boiler behind it
A back boiler is usually attached to a copper cylinder full of water which is heated up using some sort of fuel.
Usual fuel types will be solid fuel – gas.
The gas-fired back boiler such as the Baxi Bermuda was a revolutionary boiler back when it first came out and was installed in many homes in the UK.
These gas back boilers were then energy-efficient and a cheaper way of heating your home.
Now though with the advancement in technology and the introduction of condensing gas boilers, these are nowhere near as energy-efficient and could be costing you up to £700 more per year to run.
Coal open fire back boiler
This type of open fire back boiler uses solid coal fuel to heat up hot water which is sent to your hot taps and central heating system.
There aren’t that many of this type of back boiler about anymore and coal isn’t the cleanest fuel to burn.
They are also very messy and take up lots of upkeep.
If your coal first or back boiler breaks then you will also not be able to replace it with another.
If coal back boiler with a boiler behind it you could save yourself lots of money by investing in a new A-rated combi boiler and converting your heating system.
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