If you’re in need of a boiler that is suitable for a 4-bedroom home, we could provide you with the help and advice you need to make the right choice. There is a variety of boilers available, so we understand that deciding which option is best for your home could be tricky. But don’t fret, this comprehensive guide should help you choose the right boiler for your needs.


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Choosing the best boiler for a 4 bedroom house


The size of your boiler should be compatible with your heating and hot-water needs. If your boiler has too much power it could cause your energy bills to rise unnecessarily, likewise if the boiler isn’t powerful enough it could struggle to cope with your central heating needs.

Here at HomeServe, we supply boilers in a range of different sizes to suit the needs of a variety of homes. We only install A-rated boilers from leading brands, so you could rest assured that with us, you’re in capable hands.


What size boiler is best and why kW output is important


One key factor that you’ll need to consider when selecting a boiler is the kW output that your home is likely to need. kW output can be defined as a measure of a boiler’s power and determines its ability to cope with a household’s demand for heating and hot-water. Typically, the higher the demand for heating and hot water in your home, the higher your boiler’s kW output needs to be. kW output tends to also be reliant on the number of bathrooms and radiators present in your property.


There are 3 main boiler types:


Different boiler types have different kW output ranges, so the type you choose will influence the output you’ll need. Here’s a breakdown of the 3 types of boiler and an estimated guide of their kW output ranges:


Combi boilers


Compact in size, these systems provide both hot-water and heating all through one single unit. No additional tanks or cylinders are required, so they tend to be a suitable choice for homeowners looking to save space. You can find more information about combi boilers on our combi boiler page.

Here’s an estimated guide of combi boiler kW outputs to help you choose the best combi boiler for your 4-bed home:  


24-27kW 1-2 bedroom, 10 radiators, 1 bathroom
28-34kW 3-4 bedroom, 15 radiators, 1-2 bathroom
35-42kW 4+ bedroom, 20 radiators, 2+ bathroom



Conventional boilers


Also recognised as regular or heat only boilers, these systems are a traditional form of central heating. They use an additional hot-water tank and cold-water cylinder to store water, so they could deliver a supply to multiple taps at once. Visit our conventional boiler page to find out more.


System boilers


System boilers deliver heating and hot-water without using a water storage tank, however they do require a hot-water cylinder. Like conventional boilers, they also have the ability to deliver water to multiple taps at once. Visit our system boiler page to get more information about this boiler type.


To help you choose a suitable size for your 4-bedroom home, here’s an estimated guide of both conventional and system boiler kW outputs:


12-15kW 1-3 bedrooms, 1 bathroom
18-24kW 3-4 bedrooms, 1-2 bathroom
30kW+ 4+ bedrooms, 2+ bathroom



Why not try our free online quote tool?


If you’d like a professional recommendation for a boiler that could suit your needs, you could try our free online quote tool. All you have to do is answer a few simple questions about your home and your central heating needs, and in just a few moments you could receive a personalised recommendation and a free quote for the cost of installation.


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A range of options for your new boiler


Once you know what boiler size is suitable for your home, you can then go on to selecting a boiler model. At HomeServe, we’ve got the skills and expertise to help you choose a boiler that can meet both you and your family’s needs for years to come.

We also aim to help make paying for your boiler as easy as possible. Through our finance provider, you could access a flexible finance plan to help you manage your payments to suit your budget*. Take a look at our Access to Finance page to find out more.


To help you select a suitable boiler for your 4 bed home, here are some of our recommendations:


  1. Ideal Logic C35 Combi boiler
  2. Ideal Vogue C40 Combi boiler
  3. Worcester Bosch Greenstar Life 8000 40kW Combi
  4. Worcester Bosch Greenstar Style 8000 40kW Combi
  5. Worcester Bosch Greenstar 24Ri Heat-only 
  6. Ideal Logic Heat H30 Heat-only
  7. Ideal Vogue C40 Combi
  8. Intergas Xclusive 36kW Combi 
  9. Intergas Eco RF 36kW Heat-only 
  10. Vaillant EcoTec Exclusive 835 Combi


Boiler warranties


All of the boilers that we install at HomeServe come with up to 10-years warranty to provide you with an added sense of peace of mind. Should you face a boiler breakdown or fault within the system’s warranty period, you could get a repair or replacement from your manufacturer at no added cost**.


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Is your home a different size? Check out our similar guides:


Recommended boiler sizes are estimates only and should are not a substitute for expert engineer advice.

*Credit is subject to status, affordability assessment and credit checks. Interest-free credit is available over 2 years on all boiler makes. Credit is also available across 36-120 months at 9.9% APR. Finance can be taken out with or without deposit and capital payments can be made at any time to reduce your loan.

**Subject to an annual service at the customer's expense. Warranty extension from 5-years to 7-years or 10-years only available on Worcester Bosch. Warranty extension from 5-years to 10-years available on Ideal Boilers. All warranty extensions subject to an additional charge.



Information and other materials on this website are not intended to constitute professional advice and should not be relied upon. Please see our Terms of Use for further details.