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Last updated: 8 December 2023

Which is the Best Boiler For a Large 5 Bedroom House in The UK?

Best boiler for a large 5 bedroom house

Heating your home is an essential aspect of maintaining a comfortable living environment. If you have a large 5 bedroom house, finding the best heating system can be a significant investment that can impact your central heating cost among other factors.

However, choosing the right boiler can be confusing, with so many factors to consider, such as the size of your home, new boiler prices, energy consumption, and the type of boiler that best suits your home.

If you live in a large 5-bedroom house in the UK, you may want to consider the best combi boiler for a large house. Combi boilers provide both heating and hot water directly from the mains, so they’re ideal for saving up space.

Nevertheless, typically, system boilers are the recommended type of boiler for a larger house, although conventional boilers can also be good a option for large homes. System boilers have a hot water cylinder, so they can provide a high hot water output even when multiple bathrooms are in use.

Conventional boilers, on the other hand, are compatible with most older heating systems and can also provide a high hot water output, but you’ll need a separate hot water cylinder and a cold water storage tank.

Don’t worry if you’re not sure which type of boiler is right for you. We can help you save hours of your time looking for installers by providing up to 3 free and non-binding quotes from our trusted network of suppliers. 

By taking advantage of our service, you can save money by comparing and choosing the best and cheapest heating systems for your home.

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What size boiler do I need for a large 5 bed house?

On average, a 5 bed house will require a boiler with an output of approximately 30 kW, nevertheless, it is worth mentioning that size does not necessarily mean physical size.

To determine the boiler size you need for a large 5-bedroom house, it is important to note that boiler size is measured in kilowatts (kW), which indicates the amount of heat the boiler can produce per hour.

The majority of UK homes use outputs of between 24 and 42 kilowatts. A useful method to determine what size boiler your home needs is to take into account every radiator in your house. Therefore, if every radiator accounts for 1.5 kW or 2 kW, for example, a home with 10 radiators would need a boiler with an output of around 20 kW.

Boiler size needed overview
House sizeNumber of radiatorsBoiler size (kW)
3 bedrooms1020
4 bedrooms1224
5 bedrooms1530

In the table above we have provided a table showing the number of radiators and the corresponding boiler size needed. For more information, you can also view our guide on the best boiler for a 3 bedroom house. However, it is important to note that this is just a general guide. 

The actual size of the boiler you need will depend on multiple factors, including the size of your home, the type of insulation you have, and the climate you live in. It is always best to consult with a qualified heating engineer to get a tailored professional assessment.

Luckily, we can help you get in contact with suppliers in your area. Simply click on the form below and take advantage of up to 3 voluntary and free-of-charge quotes rather than spending hours of your time looking for them yourself.

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Which boiler types are the best for a large 5 bedroom house?

Thebest boiler for a 5 bedroom house will also be determined by the type of boiler you choose. There are three types of boilers: combi boilers, system boilers and conventional boilers (also known as regular boilers).

For example, combi boilers are the most popular type of boiler in the UK thanks to their efficiency and compact design. They can heat water for your central heating and hot running water without the need for other components, becoming an excellent option for those looking to save up some extra space.

On the other hand, system boilers employ an extra amount of help from a hot water storage cylinder. This cylinder can store a large supply of hot water and keep it warm enough for distribution throughout the house. 

This allows them to provide a sufficient amount of hot running water and central heating for properties that are too big to handle for combi boilers.

In the event of needing enough hot water to supply a 5 bedroom house with multiple bathrooms and radiators, a system boiler is the best fit for you. That is unless you already have a conventional boiler installed. These boilers are the oldest type of boiler and used to be the norm in the past.

Nowadays, there has been a shift away from conventional boilers due to technological advances and the large amount of space they require due to the extra components they require. They not only need a cylinder to provide hot running water to a property but also a cold water storage tank to act as their water supply. 

Therefore, the only reason to get a new conventional boiler is to replace an old one, since this will reduce installation costs as there is no need to alter the pipework.

However, a new combi or system boiler will free up a lot of space. Therefore, the boiler you choose will ultimately depend on the size of your house and how much space you are willing to give up for installing your new boiler or replacing your old one.

With this being said, it is perfectly understandable that taking into account all of the factors that will affect your final decision on choosing the best boiler for a 5 bedroom house might become quite overwhelming. 

To make your life easier, we have put together the best lists for combi, system and conventional boilers for a large 5 bed house. Of course, the final decision will be yours to make according to your specific needs and circumstances.

Top 3 best combi boilers for a large 5 bed house

Generally, thebest boiler for a 5 bedroom housewill be a boiler that has enough capacity to provide heating and running hot water for multiple bathrooms simultaneously.

Combi boilers heat water instantly when you need it, drawing directly from the mains water supply. This means they don’t store hot water in a tank, which can limit their ability to provide heating and hot water simultaneously, especially when there’s high demand from multiple bathrooms.

For this reason, the most logical choice would be to opt for thebest system boiler for a large houseor a conventional boiler, since they store hot water in a cylinder providing extra capacity.

However, there are combi boilers that are powerful enough to become suitable for a 5 bedroom house with two or more bathrooms.

Therefore, the best combi boiler for a large house can also be an interesting option for your 5 bedroom house. To help you narrow down your choices, we have compiled a list of our top 3best combi boilers for large houses:

Ideal Vogue Max C40

The Vogue Max C40 is a highly efficient condensing combi gas boiler designed for wall-mounted installation and is manufactured by Ideal. Its 93% efficiency will allow you to save money on your energy bills in light of the eye-watering energy bills of the past year.

In addition to its high efficiency, it also has a central heating output of 32 kW and a domestic hot water use output of 40 kW, which translates into Vogue Max C40 becoming the perfect fit for homes with 2 bathrooms and 15 radiators.

With a price of £1,323, it is the most affordable boiler on our list, showcasing additional advantages such as a long warranty period of 10 years and high hot water output.

However, compared to the other boilers on this list, it could be more efficient and has a relatively low central heating output.

Vaillant ecoTEC Plus 938

This high-efficiency combi gas boiler has an efficiency rate of 94% and is a relatively affordable boiler priced at  £1,703. 

Given its traits, it can potentially become the best boiler for a large house with multiple bathrooms. It provides powerful heating and hot water, with a central heating output of 30.9 kW and a hot water output of 38.7 kW. Its compact and space-saving design makes it easy to install.

Nevertheless, as mentioned above, it indeed has a relatively low central heating output of around 30.9 kW in comparison to other boilers.

Worcester Bosch Greenstar 8000 Life 50

As Worcester Bosch’s most powerful boiler, the Greenstar 8000 Life 50 delivers an outstanding amount of power thanks to its high efficiency while also having a compact design which makes its installation easy and simple.

It offers a very high efficiency (94%), a central heating output of 35 kW, a high hot water output of 48.9 kW and a long warranty period of 12 years. On the other hand, it is quite an expensive boiler in this comparison at about £2,100 and has a relatively low central heating output.

Viessmann 111

The Viessmann 111 rounds out our list of top picks for the best boiler for a 5-bedroom house. It boasts a unique blend of features that differentiates it from other options.

This model combines the convenience of a combi boiler’s compact design with the added capacity of a built-in hot water cylinder to meet the hot water demands of larger households.

Its 95% efficiency rate and output of 35 kW for both central heating and hot water make it a strong contender for the title of best combi boiler for large homes.

Despite its virtues, this model also has its downsides, such as its price in comparison to other boilers and the shortest warranty period.

To provide a general idea of important aspects and help you make a final decision, we have elaborated the table below which provides a list of the estimated prices from some of the UK’s leading boiler manufacturers, their warranty period, efficiency and more.

BoilerEfficiencyCentral heating max outputHot water max outputWarranty periodCost excluding installation
Worcester Bosch Greenstar 8000 Life 5094%35kW48.9kWUp to 12 years£2,100
Ideal Vogue Max C4093%32kW40kWUp to 10 years£1,323
Vaillant ecoTEC Plus 93894%30.9kW38.7kWUp to 10 years£1,703
Viessmann 11195%35kW35kWUp to 7 years£3,000

Top 3 best system boilers for a large 5 bed house

Having gone through the different combi models that can be suitable for a larger household, it is important to note that despite this, generally for larger houses with multiple bathrooms, system boilers are the best option. We have put together our top 3 picks for the best system boilers for a large house below.

Vaillant ecoTEC Plus 630

With an efficiency rating of 94% and a central heating output of 30.4 kW, it is suitable for larger homes with up to 20 radiators. Other advantages include its 5-year warranty, which can be extended to 10 years. Its downside, however, can be found in its higher cost in comparison to other models, costing around £1,363.

Ideal Vogue Max S32

Ideal’s Vogue Max S32 combines a high efficiency of 93% and a compact size that makes it convenient and easy to install in various locations throughout the house, allowing for a high degree of flexibility.

Moreover, it has a standard warranty of 10 years, extendable to 12 years, and is also suitable for 15-20 radiators, becoming an excellent option for larger households.

Among the downsides, it has a comparatively lower central heating output of about 32 kW compared to its counterparts.

Baxi Platinum Plus 32

This system boiler being suitable for homes with 15-20 radiators and with a warranty period of 10 years could also be a potential candidate for your 5 bedroom household.

Nevertheless, it presents weaknesses such as its lower efficiency rating (92%) and a lower central heating output compared to its competitors.

BoilerEfficiencyCentral heating max outputWarrantyCost excluding installation
Vaillant ecoTEC Plus 63094%30.4kW5 years (extendable to 10 years)£1,363
Ideal Vogue Max S3293%32kW10 years (extendable to 12 years)£1,258
Baxi Platinum Plus 3292%32kW10 years£1,032

The Vaillant ecoTEC Plus 630 has the highest efficiency rating and powerful output, making it suitable for larger properties. Similarly, Ideal Vogue Max S32 is compact and has a similar efficiency rating but a higher central heating output. 

The Baxi Platinum Plus 32 is well-suited for homes with 15-20 radiators but has a lower efficiency rating compared to the other two models.

Still unsure which system or combi boiler to choose for your 5 bedroom house? Fear no more, we are here to help. Click on the button below and we will put you in contact with up to 3 of our trusted suppliers, providing you with the information you need to make an informed decision on combi boiler prices and system boiler prices.

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Top 3 best conventional boilers for a large 5 bed house

Conventional boilers require a separate hot water storage cylinder and a cold water tank to operate. They are suitable for larger homes with high water demands and multiple bathrooms. 

Furthermore, it is only practical to opt for the installation of a conventional boiler for a 5 bedroom house if there is already one installed, making the installation process easier as no additional pipework will be required.

If you don’t have a conventional boiler already, it’s best to install a system or combi boiler instead, as they are easier to install.

In the event of your house already having a conventional boiler installed do not worry, we have also compiled a list of the best conventional boilers for larger households.

Ideal Logic Max Heat H30

This high-efficiency conventional boiler (93%) with a 10-year warranty, is suitable for large households with up to 20 radiators. However, its downsides include a relatively low central heating output of 30.3 kW and higher cost than conventional boilers.

Worcester Bosch Greenstar 8000 Life 35

This Worcester Bosch boiler is an excellent choice for its efficiency (94%), central heating output of 35kW, and long warranty. However, it can also be considered quite expensive compared to other models.

Vaillant ecoTEC plus 430

The last boiler on this list offers a very high-efficiency rating of 94%, an extendable warranty of up to 10 years, low cost in comparison to its competitors and a two-stage frost protection system, which allows this model to be installed in rooms with cold temperatures such as a loft or a garage.

On the other hand, it does rank low in comparison to its peers for its 30.5 kW central heating output. Moreover, it may not be the most suitable option for larger households with high hot water needs.

All in all, conventional boilers are a good choice for those homes with an already installed conventional boiler with hot water demands and multiple bathrooms.

BoilerEfficiencyCentral heating max outputWarrantyCost excluding installation
Ideal Logic Max Heat H3093%30.3kW10 years (extendable to 12 years)£1,117
Worcester Bosch Greenstar 8000 Life 3594%35kW5 years (extendable to 12 years)£1,546
Vaillant ecoTEC plus 43094%30.5kW5 years (extendable to 10 years)£1,167

The Ideal Logic Max Heat H30, Worcester Bosch Greenstar 8000 Life 35, and Vaillant ecoTEC plus 430 are all highly efficient conventional boilers with their pros and cons. When choosing a conventional boiler, it is important to consider the size of your property, your hot water demands, and your budget.

Receive quotes for the best boilers for a large 5 bedroom house

In summary, while there are combi boilers available that can meet the heating needs of larger households, a conventional or system boiler is generally a more suitable choice and will potentially be the best boiler for a large house.

The best heating system for a large house will depend on various factors, including the size of the property, available installation space, hot water demands, and personal circumstances. For this reason, it is advisable to seek the advice of a qualified heating engineer to determine the most appropriate type and size of boiler for your specific requirements.

If you want to avoid the inconvenience of wasting hours of your time looking for and contacting multiple engineers, we offer a quick and convenient solution by providing you with up to 3 completely free and non-binding quotes from our trusted suppliers.

By simply clicking the button below and answering a few brief questions, we can take care of the rest for you. This way, you can secure the best boiler for your 5 bedroom house for your home quickly and easily before the winter season arrives.

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Alejandro Staton Varela
Written by Alejandro Staton Varela, Writer

Alejandro, a copywriter at Household Quotes with a background in law and content creation, is passionate about sustainable and affordable home improvements, and how the EU is adapting its policies to combat climate change.

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