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Home Heating and cooling

Should I replace my old back boiler with a combi boiler?

Tyeish Liburd by Tyeish Liburd
13/05/2020
in Blog, Boiler guides, Boiler installation guides, Heating and cooling, Heating guides
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Back boilers are quite an archaic form of heating. They can be costly to run and maintain, they also tend to be a lot more inefficient than modern boiler models. If you currently have an old back boiler installed into your home, you should consider replacing it with a more modern and energy-efficient system – such as a combi boiler.

What is a back boiler?

A back boiler is a heating system that is fitted behind your fireplace. A rather outdated form of heating, these systems were used to provide heating and hot water.

If you currently have a back boiler installed into your home, it’s likely to be a Baxi Bermuda back boiler, a popular model in former times. Although these systems were popular in earlier periods, they began to fade out in the 80s when other boiler types began were developed.

 

Here’s a list of the pros and cons of back boilers:

Pros:

  • Very popular in the 1960s
  • Built with fewer components
  • Could be tucked away out of sight behind a fireplace

Cons:

  • An outdated form of heating
  • No longer energy-efficient in comparison to other boiler types (estimated to have efficiency ratings of under 80%)
  • No longer installed
  • Spare parts are very hard to find

Why should I replace my back boiler with a combi boiler?

From looking at the list above, it can be assumed that the cons outweigh the pros when it comes to back boilers. Combi, heat-only and system boilers are currently the main types of boiler systems used in the UK; combi boilers being the most popular.

What is a combi boiler?

Also known as combination boilers, combi boilers provide both heating and hot water all through one single unit. No additional water tanks or cylinders are required, so they occupy minimal space. Combi boilers are also condensing, which means that they can recover and recycle latent heat through water vapour condensation – making them highly energy-efficient.

Here’s a list of the pros and cons of combi boilers:

Pros:

  • Space saving – they can be fitted into a standard kitchen cupboard
  • Highly energy-efficient – it’s estimated that most combi boilers have an efficiency rating of over 90%
  • On-demand hot-water
  • No water tank or cylinder is required which could make water cleaner and safer to use
  • Installation could be cheaper and easier due to there being less components
  • All new combi boilers are condensing
  • Part L of the building regulations require that all new combi boilers are installed with an additional energy-efficient measure such as a smart thermostat
  • Replacing your old back boiler with an energy-efficient, A-rated combi boiler could help you save up to £200 on your annual energy bill*.

Cons:

  • No backup immersion heater
  • Water pressure can decline if more than one appliance requires hot water at the same time
  • The system will not supply hot water to taps and radiators simultaneously.

Cost of replacing your back boiler

It’s likely that a back boiler removal will take quite a bit of uprooting as it is positioned behind your fireplace. Typically, the process will include:

  • Removing the fireplace
  • Removing the back boiler system
  • Reconstruction of the mantle space
  • Installation of the combi boiler system in an alternative location
  • New pipework installed to fit with new combi boiler
  • Work to be done on the flue system to suit the combi boiler (the back boiler would have used the chimney).

 

Replacing your old back boiler with a combi boiler is likely to be an expensive job, estimated at anything from £3000 onwards. 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.

 

Your new combi boiler

If you’d like to move forward and replace your old back boiler with a modern and energy-efficient combi boiler, HomeServe can provide you with the help and advice you need. Our expert advisors can provide you with answers to your questions and our Gas Safe registered engineers can conduct a professional installation of your new combi boiler.

Try our free online quote tool today to get a free quote for your new installation. 

Get a new boiler 

 

*Source: energysavingtrust.org.uk. Saving calculated when replacing G-rated with A-rated boiler in a semi-detached house.

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Tyeish Liburd

Tyeish Liburd

Interested in all things fashion, travel, culture and a sprinkle of lifestyle, Tyeish is a Content Writer with a lot to say. Whether it’s helping you choose between bohemian or industrial for your home, or helping you keep up with the latest fashion trends, you can count on Tyeish to provide you with a fun and upbeat read!

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