GET A COMPETITIVE QUOTE

Please enter your postcode below to get a free, no obligation, personalised quotation from PlumbProud

Baxi 400 424 boiler

  1. Home
  2. Baxi 400 424
Plumbproud rating

86.57%

Baxi 400 424 Combi Gas boiler

Using the PlumbProud boiler quality scoring system, we have rated this model at 86.57%. To determine the rating, we factor in the price installed, energy efficiency, running costs, the warranty offered, and more.

On a straightforward installation of this make of boiler using PlumbProud, you should expect to budget around £1,700.

To contact us, please enter your postcode in the quote boxes on this page, click here to email us, or give us a call on 01604 343053. We can provide you with a free quote on the Baxi 400 424 boiler and offer professional advice and guidance on whether this Baxi 400 424 Combi boiler is the right choice for your home.


Installed price around

£1,700

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Baxi 400 424 Combi Gas boiler frequently asked questions

Is the Baxi 400 424 boiler a combi, regular or a system boiler?

When looking for a combi boiler for your house or flat, the Baxi 400 424 might be a suitable option for you.

Combi boilers are excellent for providing hot water and heat for your radiators just when you need it. When you have a combi boiler installed in your home, you just turn on the tap and the hot water for your bath, shower, washing dishes and other activities is there when you need it. It also provides the heat you need to keep your radiators warm.

A combi boiler heats the cold water passing through it, which it draws from the mains. This newly heated water can then be distributed to whichever hot tap or radiator needs it.

In the past, boilers needed at least one storage tank to hold water that was either already heated or would be heated later. Sometimes, you'd have to wait for hot water because there was none left. In addition, storage tanks took up a lot of space and most UK homes are pretty small.

The main disadvantage to combi boilers is that they can only heat a certain amount of water at any one time, meaning the pressure, volume and temperature of water will decrease if more than one tap is on at the same time or if both the shower and washing machine are on together.

Is the Baxi 400 424 combi boiler a suitable choice for my property?

You should make sure that the boiler you install in your property is the right "size". And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

Your boiler has to be powerful enough to heat all the hot water you need for your radiators and taps. Power is measured in kilowatts and the more kilowatts a boiler has available to it, the more water it can heat.

If the output (measured in kilowatts) is too high, you'll have all the power you need and more but your gas bills will be much higher. If it's too low, you'll often find that the water coming out of your taps and fed into your radiators is only lukewarm.

With the Baxi 400 424 combi's output at 24 kW, which types of property would this Baxi 400 424 Combi boiler be most appropriate for?

Most boiler engineers would recommend that a boiler with this output level would be most suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

When choosing a combi boiler for your home, you need to think about "flow rates" as well as output rates. This Baxi 400 424 Combi boiler's flow rate is 10 L/m.

This indicates the maximum volume of hot water (measured in litres per minute) that your boiler can heat then distribute to your taps, showers and radiators at any one time. The greater the demand for hot water in your home, the higher the flow rate you will require.

However, all combi boilers like the Baxi 400 424 draw water directly from the mains and heat it instantly.

This means that they can only heat and distribute water at the rate it enters the property (the "mains pressure" rate). For example, if your mains pressure is 11 litres per minute, this will be the highest flow rate you can achieve even if your boiler's flow rate is 17l/m.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


Dimensions of the Baxi 400 424 boiler

The Baxi 400 424 measures 700 mm tall, 395 mm wide, and 279 mm deep.

Is the Baxi 400 424 a non-condensing or condensing boiler?

This Baxi 400 424 is a condensing gas boiler - we always recommend that clients choose the latest condensing models to benefit from the technology, which continues to improve year after year.

Condensing boilers capture the heat still present in flue exhaust gases and water vapour condensation, processing them through a secondary heat exchanger to, among other tasks, heat colder water returning from your radiators.

By selecting a modern condensing boiler, you'll save money on your gas bills as well as benefitting the wider environment.

How energy efficient is the Baxi 400 424 combi?

With growing concern among the public about accelerating climate change, how we heat our homes and the impact this has on the environment has become a major topic of concern for many homeowners.

In the UK, central heating is responsible for 14% of greenhouse gas production. Domestic gas boilers emit large quantities of nitrogen dioxide in British cities.

Will you be helping the environment if you decide to install a Baxi 400 424 combi in your home? Let’s look at the figures.

Boilers manufactured after April 2018 in the UK must achieve an "A" on the SEDBUK grading system as well as score a minimum of 92% on a separate energy efficiency test. Prior to that, the minimum was 88% - boilers rated at 88% and 89% were given a “B” rating (90% and higher were given an "A").

An energy efficiency rating describes how much energy the boiler uses and how much it wastes when in use.

The Baxi 400 424 was awarded an efficiency rating of 93% with a SEDBUK grading of "A".

The aim of the Energy Related Products (ERP) Directive is to reduce the harmful gas emissions created during a product’s manufacture and active end use right through to its disposal.

The ERP rating for the Baxi 400 424 is "A" for heat and "A" for water.

Am I covered if the Baxi 400 424 combi boiler breaks down?

The manufacturer offers a parts and labour warranty of 5 years on the Baxi 400 424 boiler to new customers.


Baxi 400 424 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW24 kW
Height700 mm
Width395 mm
Depth279 mm
MountingWall
Flow rate10 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

Boiler quote

Free, no obligation quote from our engineer

Baxi 400 424 boiler

We will not be beaten on price -
ask us about our PRICE GUARANTEE!

Baxi 400 424 Combi Gas boiler

  1. Home
  2. Baxi 400 424
Plumbproud rating for this boiler
86.57%

In our PlumbProud quality testing, this Baxi 400 424 Combi boiler scores 86.57%. We determine our rating based on a number of different factors including installation costs, manufacturer guarantees, energy efficiency, and operating costs.

On a straightforward installation of this make of boiler using PlumbProud, you should expect to budget around £1,700.

For a free, no-obligation quotation on this Baxi 400 424 Combi boiler or for our professional advice on whether the Baxi 400 424 is suitable for your property, please call 01604 343053, click here to email our team or enter your postcode into the quotation box on this page.


Installed price guideline
£1,700

Get your free quote

Baxi 400 424 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?Yes
P/L Warranty5 Years
Output in kW24 kW
Height700 mm
Width395 mm
Depth279 mm
MountingWall
Flow rate10 L/m
ERP HeatA
ERP WaterA

Baxi 400 424 Combi Gas boiler frequently asked questions

Baxi 400 424 - combi, system or regular boiler?

The Baxi 400 424 boiler is a combi boiler you may wish to consider when looking for a new boiler for your house or flat.

Traditional boilers need one or more large tanks to work - one to heat and keep water warm for immediate use and the other to store water intended for heating later. Finding space for these large tanks is difficult in British residential property - remember that our houses and flats are among the smallest in the world. This is the problem that combi boilers were designed to solve when they were introduced in the 1970s.

Combi boilers don't need a tank - instead, they instantly heat water drawn from the mains using technology inside the boiler. This hot water is then distributed immediately to your taps or radiators on demand.

The biggest disadvantage to combi boilers is that they have a maximum capacity for heating water, meaning that they work best when only one point within a household wants hot water. For example, if someone is taking a shower and another person uses a hot water tap at the same time, the water pressure, volume and temperature to both points drops.

Is the Baxi 400 424 combi boiler the right choice for my house or apartment?

Whether this Baxi 400 424 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions - it means how powerful it is.

The output level of a boiler tells you how much power it has to heat the water coming from your taps and warming up your radiators. The higher the output level, the greater the volume of water it can heat up.

If the output (measured in kilowatts) is too high, you'll pay higher gas bills and your water will be piping hot. Too low and the water coming out of your taps and being fed into your radiators will often be lukewarm.

The Baxi 400 424 combi outputs at a maximum of 24 kW, so which types of property would this Baxi 400 424 Combi boiler be appropriate for?

An experienced PlumbProud heating engineer would recommend that the level of output from this Baxi 400 424 Combi boiler would make it a suitable installation option for smaller homes and apartments with up to 10 radiators and one bathroom.

You also need to choose a combi boiler with the right flow rate for where you live.

A combi boiler's flow rate is the maximum volume of water (measured in litres per minute) that it can heat and distribute to your radiators, taps and showers at the same time. This Baxi 400 424 Combi boiler's flow rate is 10 L/m.

However, combi boilers like the Baxi 400 424 draw water directly from the mains and heat it instantly.

If your mains pressure is 12 litres per minute, your boiler can only heat and distribute hot water at a rate of 12 litres per minute even if it has a higher flow rate.

Combi boilers also struggle when multiple people in your home want to use hot water at the same time - for example, someone running the hot water tap in the kitchen and two people wanting to shower in separate bathrooms.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


Making space for the Baxi 400 424

The Baxi 400 424 occupies a space of 700 mm high by 395 mm wide and 279 mm deep.

400 424 – non-condensing or condensing?

Condensing gas boilers like the Baxi 400 424 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your gas.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

What energy efficiency ratings have been awarded to the Baxi 400 424 combi?

Concern for the environment is causing more and more homeowners to think about how they heat their homes and its impact on climate change.

Approximately 14% of the UK's greenhouse gas production is caused by our central heating systems. The gas boilers in larger urban areas of Britain are mainly responsible for emissions of toxic nitrogen dioxide.

If you decide to install a Baxi 400 424 combi in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

The energy efficiency rating for a boiler describes the amount of energy it uses and wastes during operation and there are two different ways to measure it.

All boilers manufactured and supplied in the UK must have a SEDBUK rating of “A” subject to a minimum energy efficiency score of 92% or above. Before April 2018, the minimum energy efficiency score was 88% (88/89% = "B" SEDBUK rating, 90%+ = "A" SEDBUK rating).

The Baxi 400 424 scored an efficiency rating of 93% and a SEDBUK band rating of A.

The Energy Related Products Directive grades products according to the energy they consume and the harmful gas emissions they create, from manufacturing right through to final disposal, including how they're used by customers between these two points.

The Baxi 400 424 is rated "A" for heat and "A" for water.

Does a Baxi 400 424 combi boiler come with a warranty period?

A parts and labour warranty of 5 years is included when you purchase the Baxi 400 424 boiler through PlumbProud.


The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
Menu