Best boiler for a large 5 bedroom house
What boiler is best for a large 5 bedroom house?
Having the right boiler for your central heating system is extremely important for any size home but it is even more so important for the larger properties with 4-6 bedrooms, multiple radiators and numerous bathrooms. No one want’s cold water coming from their new boiler.
There are 3 different types of boilers on the market: Combi boilers which are also known as combination boilers, System boiler also known as a traditional boiler or the Regular boiler also known as heat only, or conventional boilers.
We will give you options and compare 2 models of each boiler to help you find the most suitable boiler for you.
Combi boilers are most suited to homes with 1 bathroom that don’t demand hot water and heating all in one go. For those that do have just 1 bathroom, a 25kW would be perfect for this size of the home if you were to get a new boiler for your central heating system.
System boilers, conventional boilers and Regular boilers are known to be efficient and reliable for a larger home that demands a large amount of heating and hot water for a number of baths and showers at once.
If you know which type of new boiler is most suited to your central heating you can jump to the most relevant section which will help you find the perfect manufacturer and model for your property..
Is a Combi Boiler OK for a Large House?
A System or regular boiler would be more suited than a combi boiler for a larger home.
Here we have put the 2 most powerful Combi boilers head to head to help make your decision more straight forward: Vaillant EcoTEC Plus 938 vs Worcester Bosch Greenstar 38CDi Classic.
What is a Combi Boiler?
Combination boilers living up to their name by offering both central heating and hot water on demand. They often need to live in a kitchen storage cupboard as they are small, compact and easy on the eye.
They heat water directly from the mains to provide instant hot water to the showers, baths and taps.
System and Regular boilers store the hot water in a cylinder heated by the boiler to be used as and when required.
For this reason, a Combi boiler would not be recommended for a larger home, sending water to more than 1 tap at a time will weaken the pressure and could eventually cause a breakdown.
Comparing installation boiler quotes from heating engineers is as important as comparing different boiler models.
Each Gas Safe engineer will vary the installation price.
There’s not too much to split these 2 Combi boilers in terms of their estimated price, with the Greenstar 38CDi coming in slightly cheaper but this could vary depending on the supplier.
Due to new legislation been brought into place Combi boilers now have a minimum of 92% efficiency level.
Whether you decide to go with Worcester Bosch or Vaillant you will be purchasing a high efficient, ErP A-rated boiler.
The new legislation is called Boiler Plus.
To keep the warranty valid always remember to have your annual service by a Gas Safe engineer, some brands insist you use an engineer who is on their register.
A standard 5-year warranty can be extended up to a further 10 years when installed by a Vaillant Advance installer.
The EcoTec may be slightly more expensive but in the long run, could be cheaper as it has a longer warranty therefore if any problems occur in the future you have the peace of mind that you would be covered.
As a Combi boiler isn’t the recommended system for larger homes with multiple bathrooms, we’ve compared 2 powerful units, both coming in at 38kW.
What size boiler do I need for a 4 Bedroom House, or 5 Bedrooms?
The Winner is:
The Valliant EcoTEC PLUS 938 has to be the winner due to the longer warranty and higher flow rate, Despite the slightly higher price tag,
While you would be better suited with a System or Regular boiler, there are some other powerful Combi boilers on the market that you might want to consider:
Best System Boiler for a Large House: Vaillant vs Worcester Bosch
As said before a System boiler is highly worth considering if you live in a larger home due to how they store hot water in a tank. This allows hot water to be supplied to more than one tap at a time without changing the pressure.
We’ve compared 2 System boilers that you might want to consider installing: Vaillant EcoTEC Plus 637 vs Worcester Bosch Greenstar 35CDi Classic.
What is a System Boiler?
A system boiler takes hot water directly from the mains like a Combi boiler but stores the hot water in a tank and heats the water on demand in the same way as a Regular boiler.
This method allows hot water to be delivered to more than one tap at a time without altering the pressure.
Remember the price of the boiler doesn’t include the installation cost.
The EcoTEC Plus will probably have the more expensive price tag out of the System boilers, on average £200 more that the Greenstar 35CDi Classic.
Both of the above System boilers will heat your home effectively and efficiently as shown through their ErP A rating.
Ensure you have your boiler annually serviced by a Gas Safe registered engineer to help prevent any faults occurring, to reach the full life expectancy and to keep the warranty valid.
Vaillant offers a 5 years warranty compared to the 2 years offered by Worcester Bosch.
Vaillant has the added option of extending the warranty to a further 10 years if certain requirements are reached.
The ideal output range of a System boiler being installed in a 5 bedroom house is between 35-42kW.
Both of these boilers sit within this power range but the EcoTEC Plus 637 can claim victory with a 37kW output.
If you’re not sure what size boiler you require, take a look through our boiler central guide to find the correct boiler size to suit your home.
Best System Boiler for a 5 Bedroom House: The Winner
It might have a more expensive price tag but the Vaillant EcoTEC plus 637 is a more suitable model for a large 5 bedroom house.
It also offers a longer warranty which is great for peace of mind if any issues do occur.
Best Regular Boiler for a Large House: Ideal vs Worcester Bosch
Regular boilers also recognised as the traditional boilers are the perfect system for homes with a high demand for heating and hot water.
You should seriously consider installing one if you live in a 5 bedroom house.
The head to head of 2 Regular boilers puts 2 suitable modern manufacturers up against each other:
Ideal Mexico HE vs Worcester Bosch Greenstar 40CDi Classic.
What is a Regular Boiler?
Regular boilers are the oldest type of boiler on the market, you might have heard of them under a different name: Traditional, Conventional or Heat Only.
The same as System boilers, they require a hot water tank but the difference is they don’t take water directly from the mains. Instead, a cold water tank needs to be stored in the loft which delivers water down to the cylinder.
They might be the oldest type of boiler around but they are well known for being efficient and reliable.
They’re often well suited to older homes with original pipework which can’t cope with the strength of mains pressure.
There is a fairly large price difference between these 2 Regular boilers.
The Greenstar 40CDi is available with a smaller price tag.
In addition to the cost of the unit, don’t forget to take into consideration the cost of the installation which will be different from each installer.
To get the best deal possible on the installation, we recommend getting quotes from numerous installers and comparing them. Always use a Gas Safe registered engineer.
Don’t let the price make your mind up without finishing off the other comparisons.
Regular boilers are more effective and efficient than ever due to advancements in technology over the years. Whether you go for the Ideal Mexico HE or the Worcester Bosch Greenstar 40CDi Classic, you’ll be purchasing a highly efficient, ErP A-rated boiler.
Both boilers offer a 2-year warranty as standard.
You’ll be covered for any faults that are a direct result of the parts or manufacturing.
When it comes to finding a Regular boiler for your large 5 bedroom home, the output will be between 35-42kW to meet the higher heating demands.
Remember Kw is power. Not enough power could cause a breakdown, too much power would make the bills more expensive and waste energy.
Out of the boilers we recommend here, the Greenstar 40CDi is the more powerful unit out of the two.
With an output of 40kW compared to the 36kW of the Mexico HE.
Best Regular Boiler for a 5 Bedroom House:
Winner of the best Regular boiler for a 5 bedroom house goes to the Worcester Bosch Greenstar 40CDi Classic.
It comes with the same length of warranty as the Ideal Mexico HE, yet has a higher output and a smaller price tag!!
Best Hot Water Cylinders for Large Homes
If you live in a large home with multiple bathrooms and over 4 bedrooms then we highly recommend installing a System or Regular boiler.
Both of these boilers will require a hot water cylinder.
There are 2 different types of hot water cylinder: Vented and Unvented cylinders.
A vented cylinder requires a vent pipe or tank as the water expands when heated.
Unvented cylinders have built-in safety features such as an expansion unit at the top or an air bubble that is inserted at installation to cope with the excess.
Unvented take their water supply directly from the mains so there is no need for a cold water tank in the attic.
They can be installed pretty much anywhere in your home and provide a much stronger flow of water.
The system is completely sealed which helps to prevent contamination. This is because you don’t need a tank of water.
Knowing Which Size Cylinder you Need
Getting the correct size cylinder will help prevent wasting energy and will provide your property with enough hot water.
To give you a rough size guide: “For every person living in your home add 35-45 litres to the size.”
To get the perfect cylinder for your home, you should question a qualified installer for their advice.
For large properties with multiple bathrooms, you’ll be looking at a capacity of 300+ litres.
Firstly get installation quotes from qualified Gas Safe engineers.
Remember everybody will charge differently. Secondly, fill out our contact form and we can help you choose the most suitable boiler for your home.
We have an exclusive agreement with Boiler Central who provide new boilers online with fixed prices and instant online finance decisions. They also offer (and they’re the only company offering this) a huge 15-year warranty on all Viessmann boilers.