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Last Updated on October 31, 2023

Best combi boiler for 3 bedroom house

When choosing the best combi boiler for 3 bedroom house, it’s useful for you during the research process to understand that what works for one property, may be different for another.

That’s what we’re here to help with.

It’s extremely important that you conduct thorough research so that you’re not dealing with an incorrect installation. To help avoid this, make sure you choose an installer who has alligned themselves with a manufacturer, otherwise you could end up dealing with any number of combi boiler problems. As an example, Boilerhut have alligned themselves with Viessmann and we are a national premium installer. On top of this, we’ve gathered all information needed for the best combi boiler for 3 bedroom house.

The truth is, the average house has just 2.95 bedrooms. Although this number is the lowest it’s been in the past 90 years in the UK, it does indicate in part why combi boilers themselves have been so popular. Combi boilers have more than enough power behind them to cater for this scenario. Because of their massive energy saving benefits, they’ve been a popular choice for many years now. But how do we go about choosing the right combi boiler?

For a 3 bedroom property, we will generally always recommend a combi boiler. However, there may be some occassions where this isn’t the best option. Reasons include:

  • Your property’s current heating system is not in good enough condition or you have pipes buried in concrete and isn’t suitable to pressurise the heating circuit
  • You may have made conversions to your property for additional bathrooms

Want to know what other options you have besides combi boiler for a 3 bedroom house? Scroll down to the bottom of the page for further information. Alternatively, you can also read some of our other articles:

Without further ado, let’s begin!

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Which is the best combi boiler for 3 bedroom house?

Before we go into what the best combi boiler for 3 bedroom house is, let us remind you that you can also get useful support and advice by getting a free, no-obligation quote. Simply enter your postcode in the box below and then click the green button. Once this is done, we’ll be able to provide a detailed quote within minutes, and advice on which combi boiler is best for you. Give it a try!

What Boiler size do I need?

A typical 3 bedroom house in the UK has 1 bathroom. Knowing how many bathrooms you have in your property is important for choosing the right boiler size. There are many different types of 3 bedroom houses, and dependent on the year of construction, it may also have an ensuite as well.

For a quick breakdown on the best boiler size, please use the table below:

[table id=2 /]

Having more than 3 bathrooms in a 3 bedroom property would be extremely unusual, under these conditions we may not recommend a standard combi boiler. There are still other options for you to consider such as a storage combi boiler.

If you’d like more information on these options, you can either scroll to the bottom of the page, or get in touch via email at Alternatively, you can also get a no-obligation quote by filling in your postcode and clicking the green button below. From there, you’ll be able to enter how many bathrooms you have and get a good idea of the best boiler size for you.

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Which Boiler is Best?

When choosing a specific boiler or brand, it’s important that you make a decision based on reliability and reputation. A new boiler should last around 15 years, which means it should also help you through 15 different winters and needs to do the job well.

It’s always very tempting to go for the cheapest option. Whether this is a brand like Biasi, Ferroli or Alpha, it’s often an easy choice because of the appealing price tag for the installation. However, what often gets overlooked are the expenses towards frequent boiler repairs if the boiler itself isn’t a high enough quality.

These are our recommendations of the best boilers for an average 3 bedroom house in 2019.

ViessmannVitodens 111-W Storage Combi Boiler26£1,558 inc. VATGas/LPG
ViessmannVitodens 100-W Combi Boiler35£1,162.84 inc. VATGas/LPG
Worcester BoschGreenstar Highflow 440CDi Floor Standing Combi Boiler29£2,225.98 inc. VATGas/LPG
VaillantecoTEC plus 938 Storage Combi Boiler38.7£1,578.98 inc. VATGas/LPG
ViessmannVitodens 200-W Combi with Weather Compensation (98% Efficiency)30£1,763.03 inc. VATGas/LPG
ViessmannVitodens 050-W Combi Boiler35£850.48 inc. VATGas/LPG
GrantVortex Eco External System 26-3526£2,047.19 inc VATHeating Oil

Please note: The prices above are from an online plumbing wholesaler for boiler only, and do not cover the installation costs or any extras.

1. Viessmann Vitodens 100-W

The 100-w is one of the best boilers on the market, hands down. It’s affordable, reliable and comes from one of the greatest boiler manufacturers in the world, Viessmann.

Although it has a lower price tag than other options, the Viessman Vitodens 100-W combi boiler without a doubt remains a premium boiler, able to stand its ground well against other competitors.

You can find a more detailed review of the 100-w by clicking here.

Key Features:

  • Output availability ranging from 4.7 to 35kw
  • Efficiency rating of around 94% with weather compensation and smart thermostat controls
  • Patented Stainless Steel Inox-Radial Heat Exchanger – Excellent corrosion resistance
  • Patented ecological MatriX structure cylinder burner
  • Easy-to-use controls thanks to backlit LCD touch screen
  • A-rated energy efficiency
  • Combined PRV and condensate connection saving time and expense for installation
  • Compact dimensions
  • Warranties of up to 10 years available on the boiler if installed by a Viessmann-approved engineer such as Boilerhut
  • Environmentally friendly thanks to low carbon emissions
  • Boiler quietly works in the background with low fan speed – out of sight, out of mind.
  • Officially endorsed by Which?
  • LPG Conversion Kit Available
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2. Worcester Bosch Greenstar 34CDi Classic Combi Boiler

Worcester Bosch have been one of the most popular boiler brands in the UK for a number of years now. They get their strong reputation from a combination of customer satisfaction surveys as well as various industry reports.

It’s pretty much a given that most people looking for a boiler have heard of Worcester Bosch. With their benchmark Greenstar range, they’ve manufactured some very impressive boilers with strengths in efficiency and reliability. However because of their popularity, Worcester Bosch can also afford lower-quality materials for their components, such as their Aluminium heat exchanger. By choosing Aluminium, one can assume that they’re so far on the leaderboard they’re actually ignoring what people want from their boilers – a reliable, long-lasting boiler that does the job without any hassle.

Some features of their flagship Greenstar 34 CDi classic combi boiler:

  • The 34 CDi boasts the highest water flow rate of all boilers in the Greenstar combi boiler range
  • Easy-to-use controls with simple temperature display
  • Electrical usage reduced by low energy pump
  • Improved comfort due to wide choice of controls
  • Hot water is always available in an instant
  • Refilling system is made easy by inbuilt keyless filling link
  • Frost protection included

3. Vaillant ecoTEC Pro 30KW Combi Gas Boiler

Much like other combi boilers on this list, the Vaillant ecoTEC Pro boilers are a cost-effective option that can give you the hot water you need in an instant. In doing so, these boilers can also help you reduce your carbon footprint. The ecoTEC Pro boiler is also compact, allowing you to save on space as well as a very low noise level during operation. This means that you can go about your day and you wouldn’t even know that the boiler has been operating the whole time!

As another example of a German Manufacturer making a big name for themselves in the UK, Vaillant have produced an impressive boiler that serves as a strong solution for best combi boiler for 3 bedroom house.

Key Features of the ecoTEC Pro 30KW Combi Gas Boiler include:

  • Compact boiler size – (720mm x 440mm x 335mm)
  • Improved access and installation process thanks to removable side panels and push-fit flue system
  • Efficiency rating of 89.3%
  • Which? Best Buy and Quiet Mark approved
  • Improved energy efficiency thanks to NOx burner and fan
  • Two-stage frost protection for all-year round operation
  • Intelligent controls and accessories available
  • Modulation range of up to 1:4

4. Viessmann Vitodens 200-W

When talking about the best combi boiler for 3 bedroom house, the Viessmann Vitodens 200-w is easily one of the best boilers available. This is a powerful condensing boiler that’s perfect for larger homes, but can also serve you well if you live in a 3 bedroom property. According to Viessmann, the 200-w is designed to introduce homeowners to a ‘new generation of heating systems’. With higher efficiency and lower emissions, it’s ideal for anybody who considered themselves environmentally-friendly.

The Viessmann Vitodens 200-w is an excellent choice of boiler for a 3 bedroom property, utilising key features to bring you comfort such as:

  • Energy Efficiency Rating: A. With an efficiency of 98%, next to no fuel is wasted
  • Low fan speed ensures boiler operates no louder than 39 decibels – works in the background to bring you the comfort you’d expect
  • Compact dimensions of boiler – the 200-w is only 450mm wide allowing greater flexibility for installation throughout house
  • Vitotronic control unit is easy to use, uses a 7-inch colour touchscreen
  • Internet connection to boiler via WiFi interface
  • Modulation range of 1:17
  • Patented Inox-Radial Stainless Steel Heat Exchanger and MatriX cylinder burner
  • Consistent, high energy efficiency ensured thanks to Lambda Pro Control Plus Combustion Controller
  • Easy installation due to combined PRV (Pressure Release Valve) and Condensate
  • Viessmann-approved installers able to be notified via optional remot

With all this considered, the 200-w is easily one of the msot efficient and powerful boilers available. It is able to beat out the competition in most areas, and is generally considered an excellent choice. While it more expensive than other options, it remains a highly advanced product that can actually save you more money in the long run thanks to many of its energy saving benefits. As well as the UK, the 200-w has been listed as the best in combi boilers in 2019 in Viessmann’s own home ground, Germany.

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Best combi boiler for 3 bedroom house – What is a Combi Boiler?

Before we explore the best combi boiler for 3 bedroom house, we need to clarify what we mean when we mention a ‘combi boiler’.

In the world of boilers, ‘combi’ is short for ‘combination’, and combines all the components for hot water from your taps and central heating in one, compact unit. This is different to other types such as the regular or ‘open vent’ boiler that typically require a cold water storage tank in the attic and a hot water cylinder. With combi boilers you can save a lot of space, as well as only heating up water when it’s required, saving you a lot of money in the long run.

Energy used to heat the water is kept to a minimum. Nothing is wasted trying to keep your water constantly heated.

Many combi boilers available today will be able to provide heating and hot water, but you’ll need to choose one with the appropriate output to cater for the number of bedrooms you have. Even then, as long as you get the right support from industry experts, you’ll be guided through anything that you’re unsure of to make sure you don’t miss out.

Unsure on how combi boilers work? Take a look at our detailed guide.

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How does a combi boiler work?

Central Heating

If you look at the cross-section diagram below, you’ll notice that combi boilers house two separate heat exchangers inside the compact unit. For the primary heat exchanger, its focus is on heating water from the mains supply to go straight to your radiators. As your radiators are then heated up, the water is returned back to the boiler where it continues to operate. This is the ideal result we want when deciding on best combi boiler for 3 bedroom house.

best combi boilers 2019, how a combi boiler works cross section diagram

Because this heated water has now passed your radiators, it’s prone to collecting the magnetic sludge, grime and dirt that can get deposited at the bottom*. With this in mind, you definitely don’t want to be drinking from the same source as your central heating…so how do we get clean, drinkable water from a combi boiler?

*You can avoid a build up of magnetite sludge and rust by having a magnetic filter installed at the same time as your boiler. Read our article on Are Magnetic Filters Worth it? for more information.

DHW (Domestic Hot Water)]

The sludge that ends up mixed with the magnetite sludge in your radiators means it’s complete unsafe to drink (as it would be anyway). However, this same water gets used again because the heat produced can still be recycled thanks to the boiler’s secondary plate heat exchanger. As well as this, the reason you’re able to switch between your central heating and hot water supply is the boiler’s diverter valve. It’s when this switch takes place that you may be able to hear a ‘clicking’ sound when you turn on your taps for hot water.

What is a Storage Combi Boiler?

Besides the traditional combi boiler that most people know in the UK, storage combi boilers offer a good alternative for anybody needing a little more to heat their homes. Storage combi boilers come with an integrated hot water cylinder inside the boiler itself. Because of this, they’re a great choice for homeowners with a higher demand for water, as well as anybody who wants to save on space. Remember: They don’t require a cold water storage tank, or a separate hot water cylinder elsewhere in the property.

With this in mind, an example like the Viessmann Vitodens 111-W can provide the hot water you need at a rate up to 18 litres/min. This is for properties with around 2 bathrooms, so they may very well be a good choice if space and water demand are an issue for you.

To learn more about storage combi boilers and whether they’re the right choice for you, read our accompanying article for all the information you need!

Best combi boiler for 3 bedroom house – Do any boiler brands have the upper hand?

Naturally, there are many brands brands available on the market all looking to provide you with a well-designed, fully functioning boiler that you’ve come to know and expect. Although the number of brands can be overwhelming, competitors as a result are actually forced to step up their game and improve their products and services – meaning life is made much easier for all of us using these boilers. This can even be applied to warranties, where many companies such as Viessmann are able to offer extended warranties of up to ten years to ensure your boiler gets the care and attention it deserves.

Benefits of choosing a manufacturer-alligned installer

Choosing the right company makes a massive difference on the outcome of your boiler installation and ongoing relationship. Boilerhut operate as premium Viessmann installer all across the UK.

Why does this matter?

Boilerhut are a premium, Viessmann installer. We are installing thousands of boilers for Viessmann across the UK, and have a strong relationship with the manufacturer. Because of this influence and cooperation, we can provide you with many benefits:

  • Our  close working partnership with Viessmann allows us to give you a higher level of consistent support
  • Highly experienced installation company with all Viessmann products
  • Viessmann extended warranty
  • High-quality manufacturer service – ensures your boiler performs exactly as promised

If you’d like to know more about the benefits of choosing Boilerhut as your installer, you can contact us directly on 029 2009 9898 or get a free, no-obligation quote by entering your postcode and clicking the green button below!

Get Your FREE Online Quote Today!
Save up to £590 PER YEAR on your heating bills.
Getting a quote takes less than 2 minutes. No obligation.
Save up to £590 PER YEAR!
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