SAVE hundreds per year on your energy bills by installing a Boiler!
Answer these simple questions and we will find you the BEST prices.

?

?

?

?

?

Save hours of research time
Save hours of research time

Get up to 3 quotes by filling in only 1 quick form

Slash your energy bills by installing an energy efficient boiler
Slash your energy bills by installing an energy efficient boiler

Compare quotes and find yourself the best deal

Future proof your home
Future proof your home

Increase the value of your home by installing a new boiler

Mentioned in
Last updated: 13 March 2024

Which is the Best Boiler For a 4 Bed House in The UK?

Best boiler for a 4 bedroom house in the UK

Do you live in a 4 bedroom home but are unsure what is the best boiler for a 4 bedroom house? Choosing the right boiler for your house will not only ensure you have a comfortable and well-heated home but also keep your central heating costs down.

Fear not, for we're here to guide you from start to finish on everything there is to know and guide you towards the best boiler for your 4 bed house. We'll explore the best combi, system, and conventional boilers on the market, helping you determine which one aligns with your specific needs.

If you want to avoid spending hours tediously calling engineers one by one on your own, answer some short questions, and we'll take care of the rest for you. You'll then be quickly on your way to having the best boiler for your 4 bed house. Click the button below to get started.

Click to Get Quotes

Fill in the form in just 1 minute

What size boiler do I need for a 4 bed house?

Typically, a 4 bedroom house will have more than one bathroom and around 10 to 15 radiators, therefore it will require a boiler with an output of approximately 20-30 kW. Nevertheless, it is important to remember that size doesn't always equate to physical dimensions.

In the realm of boilers, size is measured in kilowatts (kW), which represents the boiler's ability to generate heat per hour. The larger the home, the greater the boiler output needs to be.

Moreover, determining the ideal boiler size for a 4 bedroom house is not a straightforward task with a single definitive answer. However, there are some practical calculations we can employ to obtain a reasonable estimate. 

As a general rule of thumb, if each radiator consumes around 1.5 kW to 2 kW of power, a house with 10 radiators would require a boiler with an output of approximately 20 kW.

Contrary to popular belief, the size of your boiler is not determined by the number of bedrooms in your home; instead, it is primarily influenced by the number of radiators. Together with that, consider the size of the rooms and the overall insulation of your home to accurately determine the boiler size for a 4 bed house.

Guide to boiler sizes
Number of RadiatorsNumber of BathroomsBoiler Size (kW)
Up to 101 to 215 to 20kW
10-153 to 420 to 30kW
15-205 or more30 to 40kW

In the table above we have provided the number of radiators and the corresponding boiler size needed.

For example, the best boiler for a 5 bedroom house will generally require more than 20kW given that a 5 bedroom house will most likely have more than 2 bathrooms, and if you are wondering what boiler size a 3 bed house needs, around 15 to 20kW in general.

However, it is important to note that this is just a general guide and is subject to change according to your specific needs and circumstances, such as the number of bathrooms and radiators.

Which boiler types are the best for a 4 bedroom house?

what size boiler do I need for a 4 bedroom house

The ideal boiler for your 4 bedroom house will depend on the specific requirements of your home and your hot water usage patterns. To make an informed decision, it's essential to understand the distinctions between the three main types of boilers: combi boilers, system boilers, and conventional boilers.

Consulting with a qualified heating engineer can provide you with a personalised assessment and ensure that you select the boiler that perfectly matches your household's heating and hot water needs.

Thankfully, we can help you out with this instead of letting you do the hard work by yourself. Click the button below and we’ll provide you with up to 3 completely free and non-binding quotes from our network of trusted suppliers.

Click to Get Quotes

Fill in the form in just 1 minute

Combi boilers, for instance, are the most popular type of boiler in the UK. Their compact design and high efficiency make them the perfect choice for those attempting to save up precious space in their home.

They can heat water directly from the mains, so there is no need for a separate hot water cylinder. This makes them a good option for homes with no more than 2 bathrooms where space is limited. However, it is important to note that combi boilers may not be able to provide a continuous flow of hot water if there is a high demand for hot water from multiple sources at the same time.

Therefore, system and conventional boilers can be considered to be the most suitable candidates for becoming your next best boiler for a 4 bed house.

Best boilers for a 4 bed house
Number of BathroomsBest Boiler Type Option
1 to 2Combi boiler
3 to 4System boiler/conventional boiler
5 or moreSystem boiler/conventional boiler

System boilers, unlike combi boilers, work jointly with a hot water cylinder. This hot water cylinder allows them to effectively store a supply of hot water, ensuring a consistent flow even during peak demand periods. This makes system boilers an excellent choice for larger homes with multiple bathrooms or a higher demand for hot water.

However, conventional boilers, which can also be referred to as regular boilers, should not be completely ruled out from the equation. If you already have an existing conventional boiler, it is in your best interest to replace your old conventional boiler with a newer version. This will save you time and money by not requiring additional pipework.

Moreover, similarly to system boilers, conventional boilers will also require extra loft space for a hot water cylinder and a cold water storage tank.

Top 3 best combi boilers for a 4 bed house

Despite system and conventional boilers being widely considered to be the most suitable options for larger households, choosing a combi boiler for a 4 bed house can also be possible, as they can have a sufficiently high output to meet the heating and hot water demands of the house.

A typical 4-bedroom house will require a combi boiler with an output of approximately 20-30 kW. However, the exact output rating required will depend on various factors, such as the size of the house, the number of radiators, and the level of insulation.

To make your life easier, we have put together a compilation of the best combi boilers for your 4 bedroom house. Here are our top picks of some of the top boiler brands, along with their respective combi boiler prices:

viessmann vitodens 200-w boiler

Viessmann Vitodens 200-W

Our first pick can reach an outstanding efficiency of up to 98% and is perfectly suitable for a 4 bedroom house given its output ranging from 25 to 32 kW. Its high efficiency will allow you to save on electricity consumption and your bills.

However, on a more negative note, it does rank lower in boiler size in comparison to the other combi boilers on this list and has a lower warranty period.

  • Efficiency:  98%
  • Output rating: 25 kW to 32 kW
  • Warranty: 7 years

Worcester Bosch Greenstar 8000 combi boiler

Worcester Bosch Greenstar 8000 combi boiler

Our second pick is Worcester Bosh’s Greenstar 8000 combi boiler, which presents a formidable efficiency rating of 94%, output of 30 to 35 kW and the longest warranty out of the three, becoming an excellent option for your 4 bed house.

The downsides to this model include its considerably lower efficiency and higher price than Viessman’s Vitodens 200-W combi boiler, for instance.

  • Efficiency: 94%
  • Output rating: 30 to 35 kW
  • Warranty: 5 years extendable to up to 12 years.

Baxi EcoBlue Advance Combi

Baxi EcoBlue Advance Combi 33

Our last choice goes for Baxi’s EcoBlue Advance Combi 33. Its main strength is its long warranty period of up to 10 years, exemplifying the brand’s commitment to customer satisfaction. 

On the other hand, it is generally pricier than its competitors and fares comparatively badly in terms of efficiency, hovering at around 93%.

  • Efficiency: 93%
  • Output rating: 29.6 kW to 33 kW
  • Warranty: 10 years

Best combi boilers for a 4 bedroom house
BoilerOutput (kW)EfficiencyWarranty PeriodPrice
Viessmann Vitodens 200-W25 kW to 32 kW98%7 years£1,516.24 to £1,674.59
Worcester Bosch Greenstar 800030 kW to 35 kW94%5 years (extendable to up to 12 years)£2,000 to £2,500
Baxi EcoBlue Advance Combi 3329.6 kW to 33 kW93%10 years£2,205 to £2,705

As you can see, the Viessmann Vitodens 200-W, Worcester Bosch Greenstar 8000, and Baxi EcoBlue Advance are all high-quality combi boilers that offer excellent performance and efficiency. 

Ultimately, the best boiler for you will depend on your individual needs and budget. If you have a large family or use a lot of hot water, then you may want to consider a boiler with a higher flow rate. If you are on a tight budget, then the Viessmann Vitodens 200-W is a good option. And if you want the peace of mind of a long warranty, then the Worcester Bosch Greenstar 8000 is the best choice.

Top 3 best system boilers for a 4 bed house

While some combi boilers can offer enough output for larger households, the best boilers for a 4 bedroom house have typically been system boilers. This is because they can provide a higher level of capacity due to their extra hot water cylinder and cold water storage.

System boilers heat water in a cylinder, which means that you will have a constant supply of hot water. Conventional boilers can be considered to be the most traditional type of boiler, and they also use a hot water storage cylinder.

For this reason, we have elaborated a list of our top system boilers for a 4 bedroom house, considering factors such as efficiency, warranty, and output, along with their respective system boiler prices:

Ideal Logic Max S24

Ideal Logic Max S24

The Logic Max system boiler, available in output ratings of 24-30kW, is ideal for heating a 4-bedroom property with multiple bathrooms.

Among its key features is a CH output rating of 24.2kW, which is suitable for medium-sized properties with 10-15 radiators. Boasting 94% efficiency and an ErP A-rating for heat, it is a reliable choice for lowering energy bills. 

Additionally, it comes with a standard 10-year warranty and is priced between £1,849 and £2,349, including VAT, installation cost, and fittings.

  • Efficiency: 94%
  • Output rating: 24 kW to 30kW
  • Warranty: 10 years

Viessmann Vitodens 200-W

Viessmann Vitodens 200-W boiler

The Viessmann Vitodens 200-W is also available as a system boiler in 25 kW and 32 kW models, and similarly to its combi boiler version, it is a highly efficient and versatile boiler that is suitable for homes with 4 bedrooms or more. 

Its 98% efficiency rating is what has positioned it on the list, alongside it being Wi-Fi compatible allowing it to be controlled from anywhere via an app, in addition to its competitive price ranging from £1,400 - £2,000.

  • Efficiency: 98%
  • Output rating: 25 kW and 32 kW
  • Warranty: 5 years with the possibility of extending to 7 years

Vaillant ecoTEC plus 624

Vaillant ecoTEC plus boiler

The Vaillant ecoTEC plus 624 is a highly efficient system boiler designed to reduce energy costs. With a CH output rating of 24.4kW, it is suitable for homes with approximately 15 radiators. 

Boasting a heating efficiency of 94% and an ErP A-rating for heat, this boiler comes with a standard 5-year warranty, extendable to 7 or 10 years when installed by a Vaillant Advance installer. The typical total price, including VAT, installation cost, and fittings, ranges from £2,027 to £2,527, becoming slightly more expensive than the other models on this list.

  • Efficiency: 94%
  • Output rating: 24 kW to 40 kW
  • Warranty: 5-year warranty period, which can be extended to 10 years

Best system boilers for a 4 bedroom house
BoilerOutput (kW)EfficiencyWarranty PeriodPrice
Ideal Logic Max S2424 kW to 30 kW94%10 years£1,849 to £2,349
Viessmann Vitodens 200-W25 kW to 32 kW98%5 years (extendable to 7 years)£1,400 to £2,000
Vaillant ecoTEC plus 62424 kW to 40 kW94%5 years (extendable to 10 years)£2,027 to £2,527

Still unsure as to which are the best boilers for a 4 bedroom house? Then we highly recommend consulting with a qualified heating engineer to get an accurate assessment of your home's heating needs.

Luckily, we can help you by offering up to 3 completely free and non-binding quotes from our trusted network of suppliers so you don't have to worry about spending countless hours looking for installers in your area yourself. This way, you can easily compare new boiler prices and choose the one that best suits your needs and budget. Click below to get started.

Click to Get Quotes

Fill in the form in just 1 minute

Top 3 best conventional boilers for a 4 bed house

Lastly, conventional boilers should not be completely disqualified from obtaining the title of best boiler for a 4 bedroom house. They can also be a good choice for those households that already have one installed, as this will save them from the hassle of extra pipework and costs.

Vaillant ecoTEC Plus boiler

Vaillant ecoTEC Plus

Valliant offers a variety of conventional boilers with different capacities and features to meet the needs of a 4-bedroom house. Vaillant boilers are known for their durability and efficiency.

With this being said, Vaillant’s ecoTEC Plus is no different, offering a high efficiency of 94% and an output maximum rating of 35kW, making it perfectly suitable for properties with around 10 radiators.

  • Efficiency: 94%
  • Output rating: Up to 35 kW
  • Warranty: 5-year warranty period

Ideal Logic Max Heat H24

Ideal Logic Max Heat boiler

The Ideal Logic Max Heat H24 is a highly reliable condensing wall-mounted conventional boiler manufactured by Ideal. With a maximum output range of 30 kW, this boiler is suitable for homes with up to 15 radiators. 

The Logic Max Heat H24 is known for its efficiency, boasting an efficiency rating of 94% and ErP A-rating for heat, and a 10-year standard warranty, showing the company’s commitment to customer satisfaction.

  • Efficiency: 94%
  • Output rating: Up to 30kW
  • Warranty: 10 years

Worcester Bosch Greenstar 8000

Worcester Bosch Greenstar boiler

The Worcester Bosch Greenstar 8000 conventional boiler is highly efficient, being able to reach an efficiency rating of 94% and is available in a wide range of output sizes ranging from 30 to 50 kW.

As a result, this high efficiency can significantly reduce your heating bills and carbon emissions, becoming a great choice for 4 bed house homeowners who want to save money on their heating bills and reduce their environmental impact.

  • Efficiency: 94%
  • Output rating: 30 kW to 50 kW
  • Warranty: 7 years

Best conventional boilers for a 4 bedroom house
BoilerOutput (kW)EfficiencyWarranty PeriodPrice
Vaillant ecoTEC Plus35 kW94%5 years£870 - £1,400
Ideal Logic Max Heat H2430 kW94%10 years£1,000 - £1,500
Worcester Bosch Greenstar 800030 kW to 50 kW94%7 years£1,100 - £1,700

Receive quotes for the best boilers for a 4 bedroom house

All in all, when selecting the best boiler for your 4-bedroom house, it's essential to consider factors such as your home's size, the number of bathrooms, and your family's hot water usage. Additionally, it's crucial to consult a professional heating engineer to determine the best type of boiler for your specific needs and home.

To ensure that you're making the right choice for your next boiler type and the cheapest heating systems supplier, you can complete our 30-second form. We will then put you in contact with our network of trusted suppliers that are located close to your place. 

This way, you can compare up to 3 quotes and find the best deal for your needs. You are then free to pick the one you prefer. The service we provide is free of charge and with no obligation so do not hesitate any longer and click below to get started!

Click to Get Quotes

Fill in the form in just 1 minute

FAQ

It's That Easy
1
Answer a few simple questions
Describe your requirements by answering some super quick and easy questions
2
Talk to installers
Up to 4 installers will get in touch with you directly
3
Receive up to 4 quotes
Compare quotes and select the best option for you