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Baxi 400 Combi Boilers

Available in two outputs, the Baxi 400 Combi Boiler has a typical price tag between £630.00 and £689.44 including VAT and excluding installation.

baxi 200 combi boiler

Launched in 2016, the Baxi 400 Combi is a super-light model that measures in at 700mm (H) x 395mm (W) x 279mm (D).

The boiler comes in two different heat outputs of 24kW and 28kW, making it ideal for apartments and small to medium-sized house. It’s also a good choice for properties where there is little loft or airing cupboard space because it doesn’t require any bulky tanks or a cylinder. One of the smartest things about this model is that it offers you the option to control your heating using a smartphone or tablet.

The 400 Combi comes with a generous 5-year warranty and will set you back anything between £630.00 and £689.44, depending on your chosen heat output.

Boiler Energy Efficiency Credentials

The Baxi 400 Combi is designed to make your home more energy efficient and therefore help to save you money on your fuel bills. It’s a SEDBUK A-rated appliance that has guaranteed efficiency levels of 89% and is recommended by the Energy Saving Trust. To improve efficiency and help keep your energy bills low, the boiler can be used with an optional uSense smart room thermostat that allows you to control your heating even when you’re not at home.

400 Combi Technology and Main Advantages

Weighing just 26kg, the Baxi 400 Combi is extremely lightweight to make life easy for your engineer during installation. It comes with a simple hanging bracket and a choice of flue lengths to enable the boiler to be installed virtually anywhere in your property. An optional stand-off frame can be supplied as well.

The range includes two output sizes with different maximum hot water flow rates, which are as follows:

  • 400 24kW Combi – 9.8 litres per minute
  • 400 28kW Combi – 11.5 litres per minute

Other key features include an LCD display and user-friendly temperature controls that make it easy for you to programme your heating times. You can even switch your heating on from your smartphone when you’re not at home, provided you purchase the optional uSense control.

Is the Baxi 400 Combi the Right Boiler Type and Size for Your Home?

Since this model is a combination boiler, it heats water directly from the mains so you won’t need bulky tanks in the loft or a hot water storage cylinder in your airing cupboard. This makes the Baxi 400 Combi an excellent option for homes with limited loft and storage space. As a rough guide, the 24kW output unit will comfortably heat an apartment or small property with just 1 bathroom and up to 10 radiators. As for the 28kW 400 Combi, this unit is best suited to a medium-sized home with 1 bathroom, around 15 radiators and possibly an ensuite. Before selecting a new boiler, you must consult a Gas Safe engineer to assess your home and your typical heating and hot water usage habits.


Compare Boiler Quotes!
Baxi 400 24CombiH - 700 mm
W - 395 mm
D - 279 mm
9.8 24 KW£ 689.44
Baxi 400 28CombiH - 700 mm
W - 395 mm
D - 279 mm
11.5 28 KW£ 630.00


A-rated conventional boilerSave money on your gas bill
Compact and lightweightEasy to install and fit into a small kitchen cupboard
Easily accessible electrical connections and controlsEasy to maintain and control your heating
Compatible with uSense smart controlAdjust heating from a remote location using your smartphone
Vertical packaging and simple hanging bracketEasy to transport and unpack
5-year parts and labour warrantyConfidence and peace of mind

Our Honest Opinion of the Baxi 400 Combi Boiler

Considering the smart features and advanced components of the Baxi 400 Combi, we believe this is a decent value for money appliance. Plus, you can rest assured that Baxi has a longstanding history for innovation and a solid reputation for producing high-quality products.

We would prefer it if the boiler came with a 7 or 10-year warranty rather than just 5 years of cover, but we must not forget that the 400 Combi is an energy efficient boiler with an inexpensive price tag.

Advice on Boiler Quotes and Gas Safe Engineers

If you decide that the Baxi 400 Combi is the one for you, we suggest you shop around and obtain quotes from local and national companies so that you can compare prices. It’s a good idea to get at least three quotes on the boiler and installation to increase your chances of finding a great deal. You must also make sure your chosen engineer is qualified to carry out the work that needs doing and is listed on the official Gas Safe Register. It’s easy to check, simply ask to view their Gas Safe ID card or head on over to the Gas Safe Register website. And don’t forget, you can use our free online service to receive and compare no-obligation quotes from local and national dealers.


Compare Boiler Quotes!

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