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Baxi 100 Combi Boiler

If you are looking to replace your existing boiler, but are on a tight budget then the Baxi Combi 100 could be the right choice for you.

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The Baxi 100 is a compact, A-rated gas combi boiler that can easily be installed in a kitchen cupboard and enables you to control it from your tablet or smartphone. This is because it’s designed to be a small boiler in their large range of boilers.

This boiler doesn’t take up much space, which means it is suitable for both small to medium homes with low heating and water demands and flats. One to four-bedroom homes with one bathroom.

The Baxi Combi 100 will fit in a 300mm kitchen cupboard, is simple to install and service, and can be operated with the use of a uSense smart thermostat, to enable you to control your heating from your smartphone, tablet, Alexa or Google.


How Much Does the Baxi 100 Combi Cost?

The price of this boiler will depend on the kW output your heating engineer recommends you need to run your home efficiently and effectively.

It’s available in both 24kW and 28kW.

Baxi 100 Combi Boiler Compare Boiler Quotes

In comparison to some of the other best combi boilers available on the market, this boiler is seen as a budget-friendly option and typically costs between £680 and £730 including VAT.

This does not include boiler installation fees from a registered Gas Safe fitter. 


How will I know if Baxi Combi 100 Boiler is Suitable for My Home?

The Baxi Combi 100 is a gas-fired combination boiler, which means it doesn’t need to be installed alongside a separate water storage system for your hot water or cold water tank.

This makes the Baxi 100 Combi perfect for smaller homes and properties that have limited loft space or storage.

This boiler only heats water on demand so therefore only uses energy when you need hot water.

Most combi boilers don’t handle more than one shower running at the same time, so it might not be the best choice for a home with more than one bathroom.

To clarify and ensure you are getting the right boiler for your home it’s best to seek advice from a Gas Safe registered heating engineer.


Is the Baxi Combi 100 a High-Efficiency Boiler?

The Baxi Combi 100 is an A-rated natural gas boiler.

it has a great efficiency of 90.9%.

It is also recognised as an Energy Saving Trust product.

If you opt to have the smart room uSense thermostat with three years warranty, you will also be able to monitor exactly how much energy you are using.

Baxi 100 Combi Boiler Compare Boiler Quotes

This should help you to save extra funds on your energy bills.


Does the Baxi Combi 100 have a Good Range of Controls and Features?

This boiler comes with concealed user controls, including a reset button, a system pressure gauge with separate hot water and central heating controls.

You will find a clear and bright LCD screen that is compatible with a range of optional controls like uSense smart thermostat, RF digital 7-day programmable room stat and a plug-in 24-hour digital timer.

Looking at the features of this boiler you will find an integral frost thermostat and front access to components for ease of access servicing.

Baxi 100 Combi Boiler Compare Boiler Quotes

Other optional features include a choice of boiler flue length and a range of accessories for hanging the boiler pretty much where you choose.


How long is the Warranty on the Baxi Combi 100?

The Baxi 100 Combi will come with a free 2-year manufacturer warranty, it covers you for parts and labour. This is not a very long warranty.


Advantages & Disadvantages

Heating engineers tend to like the Baxi boilers, however, some customer isn’t as keen. This has led the brand to gain an average overall Which? Score.

Below, is a full list of the pros and cons of the Baxi 100 Combi boiler.

Baxi 100 Combi Boiler Compare Boiler Quotes



  • Suitable for small to medium-sized homes and flats
  • Will fit in a 300mm deep kitchen cupboard
  • Doesn’t require separate cylinder or loft tanks
  • Easy to install and service
  • Kinder to the environment because it’s a NOx Class 5 boiler
  • Reduces carbon emissions and fuel bills as it provides maximum energy efficiency
  • Compatible with uSense smart room thermostat which enables you to monitor your energy use and control your heating using a smartphone or tablet, from wherever you are.


  • Baxi has an overall Which? score of 54%
  • Short 2-year warranty, would be nice to have a longer warranty

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What our customers think

5 Stars on Trustpilot

Would recommend

Stressed when needed a new boiler but easy process with affordable finance. New boiler installed within a few days with option for next day.

Paul Jones 5 Star on Trustpilot

We were very impressed

On the day, they came on time. Lovely people, they kept everything clean. Explained everything to me. No mess, kept me informed.

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Great experience - quick to arrange, easy to work with the very responsive online team and all installed faster than expected.

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