What is a back Boiler?

Back boilers (also known as back boiler units or BBUs) became popular in 1966 with the launch of the original Baxi Bermuda.

 

A back boiler is a small, compact boiler fitted at the back of an open fireplace hearth. It sits behind a gas fire and provides hot water and central heating to the property.

 

Back boilers were popular until the Building Regulations changed in 2005, when it became a requirement to install high efficiency condensing boilers. Although many have been replaced with wall-hung condensing boilers, there are still a large number of back boilers still installed in UK homes.

 

An old standard efficiency back boiler is less than 70% efficient – so for every £1 of gas burned, on 70p worth of useable heat is generated and the other 30p worth is lost up the chimney. By replacing it with a new boiler at over 90% efficient, fuel bills can be reduced by up to £305, according to the Energy Saving Trust.

Our Boilers

Baxi 800 Heat Only Boiler

Combi Boilers

Our range of combi boilers are available in a variety of outputs to suit the installation requirements, they are super easy to install and compact, allowing them to fit neatly into a standard cupboard.

Baxi 800 Heat Only Boiler

Heat Only Boilers

Our range of heat only boilers are available in a variety of outputs to suit the installation requirements, and are compatible with our Baxi cylinders and Megaflo Eco range.

Baxi 800 system 2-1 Boiler thumbnail

System Boilers

Our range of system boilers are super easy to install, compact and are compatible with unvented hot water storage cylinders like our Baxi Cylinders and Megaflo Eco range.

Baxi - Heatrae Electromax Electric Boiler

Electric Boilers

Our electric boilers are easy to install and their solider state technology has no moving parts – so there is minimal servicing required.

Related FAQs

Where can I find the serial number of my boiler?

Serial number can usually be found on the drop down panel on the front of the boiler. Some boilers have a tag underneath the boiler. Find out more...

Should I turn off my boiler in the summer?

Is it ok to turn off your boiler in summer? The short answer is: it depends on your home and your circumstances. Find out more...

How old is my boiler?

You can find out how old your boiler is by visiting the official industry database. Read more...

How often should I have my boiler serviced?

Boiler repairs can be expensive and inconvenient. We advise you have your boiler serviced every year in accordance with the manufacturer’s instructions.

Why is my boiler pressure low?

The pressure on your boiler can go up or down for different reasons. Find out how to adjust it and what to do if your boiler keeps losing pressure...

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