Baxi 400 Combi Boiler Prices & Promising Reviews

What to look for while purchasing a boiler ? Why go for Baxi boilers?

Warmth and comfort come hand in hand. Scorching cold winters can bring in trouble to health and in turn to a wholesome issue. Boilers are a true source of comfort and a complete solution to many doubts. Providing warmth and standing as a true support through bad weathers and health issues; boilers have turned to a true essential through the households of all homes especially in the western and cold regions. There are several factors one must look for while looking forward to purchase a boiler. Proper reviews, advantages, disadvantages, features, and product specifications are some main requitises to look out for while purchasing a boiler.

The high efficiency heating products are easy to install, maintain and service and much easy to use. They are confident in the reliability of their product range and offer leading free parts and labour warranties, for proper complete peace of mind.

Baxi’ products offer services with pride, passion and positivity – combined with reliability, durability, respect and innovation. They have helped refine and define their company’s reputation through its worthy products.The boiler provides for Innovative and technological advanced improvements in the era of Advanced boilers. The baxi boilers provide for a large number of boilers like Combi system open and regular etc.

One seeks out the best in product with best of reliability and best assured quality. After a deep and extensive amount of research, we have refined out the essentials one seeks when in search of a device for heating water for homes. The boilers in the market seem to satisfy different and substantial requirements in various ways. The utility and sustainability thus seem to be the conclusive key factors that sum up the wholesomeness of an appropriate boiler. No user wishes to spend extensively on the installation, the maintenance and the repairs of the once installed boiler.  Nor does any user wish to exhaust the available resources and risk the safety of the members under the hazards of an ill manufactured boiler.

Baxi through its 400 Combi model provides 2 sub models with varying outputs.

  1. Baxi 400 combi 24
  2. Baxi 400 combi 28

These are the 2 types under Baxi Combi 400 boiler model.

ModelOur RatingAvailabilityPriceCustomer Rating
Baxi 400 248.8/10Available£6204.4 out of 5
Baxi 400 288.8/10Available£6904.4 out of 5

Baxi 400 Combi 24

The Baxi 400 Combi is appropriately designed to make one’s home more energy efficient and thus help to save you money on your fuel bills. The boiler can be efficiently used with an optional ‘uSense smart room thermostat’ which allows you to control the heating even while you are not home. It has a SEDBUK A-rating that guarantees efficiency levels at 89% and is highly recommended by the Energy Saving Trust.

Baxi’s 400 Combi doesn’t need any extra space or additional loft tanks or even a separate hot water cylinder, making this boiler an amazing option for apartments or houses where space is an issue. Hence it is no wonder why Combi Boilers are much preferable.

At a certain point it’s noticed that, Baxi boiler of this model does not work effectively when there are multiple bathrooms present. It seems quite a heavy task for the boiler, hence it would prove more efficient in homes having a single bathroom.



  • 5 year parts and labour warranty*
  • 28kW providing 11.5 litres/minute for good hot water performance
  • Fits inside a standard kitchen cupboard
  • For homes off the mains gas network – could save money on fuel bills
  • Dedicated 28kW LPG model 26kg lift weight easy to handle
  • Optional stand-off frame
  • Rigid filling loop
  • Simple hanging bracket
  • Choice of flue lengths


  • Phase-dependent equipment connection errors
  • Pressure setting errors, diode bridge or valve device malfunction
  • Low main gas pressure, errors in setting the lower limits
  • Errors in the installation of the chimney and fan,
  • condensate in the chimney,
  • malfunction of the pneumatic relay, violation of the contact between the relay, the board and the fan.
  • Sensitive to contaminated water.
  • The electronic board is of poor quality.


  • 400 24kW Combi – 9.8 litres per minute
  • 24kW output.
  • Quietest boiler in the Baxi range.
  • Lightweight and compact.
  • Simple hanging bracket.
  • Compatibility with uSense smart control.
  • Compatible with a choice of flue lengths.
  • SEDBUK A rating.
  • Efficiency rating A.

Baxi 400 424 24kW Combination Boiler Natural Gas ErP …

 Baxi 400 Combi 28

This is simply a variant form under the model of Baxi 400 Combi boiler. To make the differences more clear and comprehensive, we have sorted them down into a table below.

FeaturesModel : Baxi 400 combi 24Model : Baxi 400 Combi 28
ERP RatingA heat, A waterA heat, A water
Efficiency rating89%89%
BandA ratedA rated
LPG compatibleYesYes
Flow rate9.8 l/m11.5 l/m


Picking the right and most appropriate boiler from the wide varieties of models available in the market is quite a daunting task. The model, brand and price alone does not provide the basic information required to decide on the perfect boiler for your home. Choosing the right one is equally significant to ensure safety.

Safety tied to any electrical device comes at a greater expense. The quality and reliability of a brand must be more vibrant than any of its contrasting features.  The model, brand and price alone does not provide the basic information required to decide on the perfect boiler for your home.

We have jot down the valid requisites to look out for, while purchasing a boiler for your home :

  • The size of your home space available and the size of your boiler.

The Size of your home decides the size of the boiler. Lesser the number of rooms and bathrooms, lower the required heating capacity.Choosing the right size includes two major factors:

  • Heating capabilities
  • Whether the physical size would fit your home space.

It would always be best to obtain further information and advice from an engineer regarding the heating efficiency required for your home and its installation.

The use of smaller boilers for a vaster home would only provide evident inefficiency. And the vice versa usage of larger boilers for limited home spaces would lead to increased bills, increased heating of limited heating sources. Which could in adverse be dangerous.

Further requisites are :

  • ErP rating

Higher the ErP, safer and cleaner the option. As the rating increases the ability of the device to function increases but at the same time the resource consumption decreases and the savings on energy and electricity decreases with high effectiveness.

  • Lower complexity

The easy functioning and operating of devices makes it easier to handle.

The technicalities to be kept on the comprehensible side of the user is quite a  task for the manufacturers. To which the Baxi has justified itself.

  • Cost efficient and resourceful

The most highlighting feature as compared to boilers since decades is that modern boilers are resourceful and consume less electricity. They do not come with pocket tearing bills at the end of the month. The price is affordable and much advantageous since it comes with a long guarantee upto 10 – 12 years.

  • Gas boilers

Choosing an efficient boiler also means moving ahead with time and advancement.  It would be appropriate to use the technically advanced method of heating than to stick with the older methods that could prove fatal or damaging to homes. Gas seems neater and more cost effective. The modern Gas condensing boilers result in a decent energy bill and higher returns of savings on resources.

  • Compact but efficient as much as the Classic boilers.

Reduced size does not mean reduced efficiency. No compromise is appreciated when it comes to efficiency with regard to the reduced size.

  • Varied ranges.

One’s size of home and the size of device is always interlinked and helps produce the best results always.

The size is what determines the outcome and the output efficiency.  The Baxi brand offers a wider range of boilers with distinctive features which makes the process of choosing quite daunting yet offers a wider range to choose from.

What Industry Influencers Say About BAXI And Its 400 Combi Boilers ?

The brand score is what is made up of brand reliability, brand customer satisfaction and ratings from heating engineers . The Baxi 400 is powerful enough to meet the heating and hot water demands of most property sizes.

The Baxi 400 comes with a 5 year parts and labour warranty for complete peace of mind.

Baxi 400 Combi 24 :

  • Efficiency – 89%
  • Ease of use – 90%
  • Quality – 90%
  • Resourceful and cost effective -91%
  • Compact – 95%

The Baxi 400 Combi is a typically modern condensing gas boiler that offers you the option to control your heating using a smartphone or tablet. Available in two variants or outputs, the Baxi 400 Combi is ideal for small and medium households requiring a boiler that is small enough to fit inside a kitchen cupboard.

Extremely quiet in operation, compact and lightweight in model, it is highly efficient. Baxi 400 24kW Combi Boiler can be installed anywhere in your home. Much simple to use the Baxi 400 where it provides plenty of heating and hot water as per requirement. The boiler has a rigid filling loop for a cleaner finish and has the option to be operated using a smart phone . The reliable Baxi technology is backed by a five year parts and labour warranty.

Baxi 400 Combi 28

  • Efficiency – 89%
  • Ease of use – 90%
  • Quality – 90%
  • Resourceful and cost effective – 91%
  • Compact -95%

With all the rich benefits of a high efficiency boiler for our homes using LPG the Baxi 400 28kW combi comes;  compact, easy to maintain and delivers excellent flow rates. Easy to use, the boiler provides plenty of heating and hot water and features a rigid filling loop for a cleaner finish. The Baxi 400 28kW has the option to be operated using a smart phone or tablet and the reliable Baxi technology is backed by a five year parts and labour warranty.

Stories From The Real World Use Cases

  1. Name : K. Norton
  • Date: 24 February 2018
  • Boiler bought: Baxi 400, 24
  • Rating : ⅗

comment :

‘ The best feature about this boiler for me is the weight of the appliance. I was able to carry it from my van into the house ,up the stairs and lift it onto the wall in side a cupboard,on my own. It is handy to have the boiler secured hot the wall and have the flue connected straight away.the flue connection measurement was slightly awkward and not clearly written in the instructions.the filling loop kit came separately and was quite fiddly to fit ,especially as it was so close to the boiler return pipe where I had fitted a magnecleanse. However the fittings were good quality and well thought out.the route for the wiring I found awkward as there was nothing in the instructions to show you how.when it came to firing up and commissioning it was instant and simple and the pump purge feature was very useful.I would highly recommend this boiler for ease of 7installation and performance’.

  • Name : Dyscarr Property Services
  • Date : 23 February 2018
  • Product: ⅘
  • comment:

Easy install with mounting bracket and not a jig. Wiring external controls simple with molex plugs. Commissions helped with de-aerate function. Customer friendly controls 5 year guarantee for piece of mind for customer.

  • Name : McGarvie Gas Services
  • Date: 16 March 2017
  • Rating : 5/5

Comment: So easy to install, all goes together perfectly, wiring is easy to get to.

Lightweight & easy to lift onto the bracket.

Think Baxi are onto a winner with this one.

For further reference and validity on our reviews, please check:,performance%20is%20very%20good%20also.&text=Great%20little%20boiler%2C%20lightweight%20and,performance%20is%20very%20good%20also.


  1. How much does the Baxi 400 boiler usually cost ?


The Baxi 400 Combi can be bought with outputs of 24kW or 28kW, and prices vary between £620 and £690. If you need the higher output model, you can expect to pay the top end of the boiler’s price range.

  • Are Baxi combi boilers any good?


Baxi boilers might not be considered the premium boilers or the best in the market but they do certainly have some amazing products backed up by award winning customer service and outstanding warranties, so if you’re looking for a better and cheaper purchase, you might just find it in a BAXI boiler.

  • How long do Baxi combi boilers usually last?


15 years

Boilers could last up to 15 years if they are serviced and maintained properly as per the sources and Baxi website.

  • What goes wrong most commonly with a Baxi boiler or any boiler ?

Ans. A common mistake is the lack of pressure. If your system is set lower than 1.5 bar then it won’t operate accurately. The quick fix is to top up the pressure using the filling loop.

  • Why does the Baxi boiler start flashing?


 Green flash simply means your boiler is up to the temperature you requested. Green flashes means the flame has gone out. If this is a temporary issue, the boiler should reset by itself. Or else it may be taken for a proper servicing.

  • Why does my Baxi combi boiler keep losing pressure?

Ans. A common issue analysed is with debris inside the pressure relief valve. The safety valve that usually discharges water upon reaching higher pressure values starts deteriorating.  If it is dripping with water and the pressure gauge is too low, your Gas Safe registered engineer will need to clean out or replace the safety valve.


  • Baxi is a part of BDR Thermea, one of Europe’s largest manufacturers and distributors of domestic and commercial water and space heating systems.
  • The main purpose of a boiler is to produce steam. Boilers are used to produce steam. The generation part of a steam system uses a boiler to add energy to a feedwater supply to generate steam.This energy is then released from the combustion of fossil fuels or from process waste heat.
  • It is quite important to know the elements under a Boiler:

The key elements of a boiler include the burner, combustion chamber, heat exchanger, exhaust stack, and controls. Boiler accessories also include the flue gas economizer , commonly used as an effective method to recover heat from a boiler.

  • As a customer it’s commonly doubtful on which type of boiler seem the best:

Combi boilers are probably the most cost-effective boiler for most homes. They control both hot water and central heating, and their energy efficiency makes them the unit of choice for environmentally-conscious homeowners. Moreover their efficiency that does not compromise with the small and compact size.


After a deep and extensive amount of research, we have refined out the essentials one seeks when in search of a device for heating water for homes.

With all sorts of research and reviews, we have concluded that Baxi boilers are truly efficient and cost effective. When making a decision about a new combi boiler, don’t simply go for the cheapest option available. You have to make sure that the product you have chosen will work effectively to meet your specific needs and hence you should consider things like how much hot water you use, how well insulated your home is, how large your space is and how much maintenance your system might need during its working lifetime. Hence with the reviews, the warranty offered, efficiency provided and the output rating, Baxi boilers are quite the customer supporting, and advanced device.

Much to suffice and supplement the needs of a customer, the brand has replaced these variants today with much more innovative substitutes.

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