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Which is the best combi boiler for 2021?

Best combi boiler

The best combi boiler in 2021 is what everyone wants for their home right?

Ensuring your home has the best boiler on the market to keep you warm all year-round is important for your warmth and happiness.

Best combi boiler 2021 – The best combi boilers right now.

If you have a manufacturer in mind, you can find our top pick from their range of new combi boiler options. best combi boilers

If the boilers in our best combi boiler list are not enough, then we have a list of the best boiler manufacturers below, in order of rating:

5 Best Combi Boiler options right now:

#1: Worcester Bosch Greenstar i 30kw

#2: Alpha E-Tec 28kw Combi Boiler

#3: Ideal Logic C30 Combi Boiler 30kw

#4:Worcester Bosch Greenstar 8000 30kw Combi Boiler

#5:Viessmann Vitodens 100-W Combi Boiler

 

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Top 7 Best Boiler Manufacturers

#1. Worcester Bosch
#2. Alpha
#3. Viessmann
#4. Ideal
#5. Baxi
#6. Vaillant
#7. Glow Worm

 

With the first half of 2021 having a significant overhaul in our list of the recommended boilers, with the Baxi 600 and Vokera Easiheat making the top 5. The list could change before the end of the year.

Some excellent new combi boilers are coming out as well as rumours that Viessmann is looking to compete with Worcester’s new Greenstar 2000 boiler.

Getting a new boiler is not all about how much it will set you back and the highest spec boilers so our handy list of the top combi boilers that are available on the market right now, giving you our feedback with no confusing jargon.

We test each of the boilers rigorously with our extensive review process, ensuring that we check everything from the energy usage to the output and flow rate.

Most importantly, considering how reliable they are, design, ease of use and if they will last a long time.

We will then take into account the costs associated with each boiler. Not everyone prefers an all singing and dancing combi boiler, so we have something for everyone’s budget in our ranking decisions.

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How do we pick the best combi boilers?

As we install thousands of boilers each year, so we really do get to find out what our customers love and hate.

Not only that, but we know how reliable boilers are and due to us selling the full market range of boilers we sell all brands, not just certain ones. Finding the best combi boilers at the best price is what everyone wants, so let’s go get them.

To find out the best boilers we take into account:

  • Customer surveys- customer reviews
  • Boiler specifications – main boiler reviews
  • Warranty length – manufacturers trust of how long a boiler will last
  • Issues raised will are logged weekly
  • Price – best buy boilers
  • Aftercare from the manufacturer
  • Manufacturer online reviews

All of the above areas are the main factors that we take into account when picking the best new gas combi boilers on the market.

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Reviews of the best boilers in 2021.

So you’re on the market for a replacement boiler?

But before we tell you how we get to our conclusions on the recommended and best boilers, let us first break down some interesting stats and quick summaries for you.

Best Central Heating Boiler

We have all heared of Which? right?

Which? is the leading consumer powerhouse that tries, tests and reviews a whole range of products and services available on the market.

They then come up with the top picks and tell us all what is the best domestic boiler to buy.

New Boiler costs (which logo)

Which? Also feature central heating boilers and provide their boiler options, of which (excuse the pun), the Worcester Bosch Greenstart 8000 combi boiler is the best buy boiler they have chosen for 2021.

So, with both Boiler Central and Which? claiming the Worcester 8000 is the boiler to buy this year then, why not get a fixed price on this exact boiler now?

Click here to get an online price in 20 seconds on the Worcester Bosch Greenstar 8000 combi boiler.

Summary of the best new combi boiler to buy this year:

Be sure to read further down to get a real review on why they are the most recommended combi boiler manufacturers on the market in 2021.

We’re here to inform you of the best combi and system boilers that are available to buy in the UK in 2021.

After extensive research and looking at thousands of online reviews, we have put together a rigorous benchmark system to find the best available heating and hot water boiler systems on the market today.

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The best combi boilers – Our verdict

Our aim for this guide is to give you an idea of the best boilers on the market for this year so that you can make a decision based on facts.

We also want to show available options from boiler manufacturers and the types of boilers on the market in 2021.

Again, if your boiler is getting old, say 8 to 10 years old, and gas bills are starting to creep up then you may want to consider upgrading.

Getting the best gas combi boiler ensures that you have one that is efficient and durable. It keeps your central heating system ticking over at the perfect temperature with hot water available as and when you need it.

With huge competition in the boiler market, you need to make sure you take your time in order to get the best deal you can on your new boiler.

If you think your boiler is on its way out, then you should definitely start doing your homework just in case, and that’s probably why you’re reading this article!

As much as you don’t want anything to happen, it can be quite reassuring that if you do need a boiler quickly, some installation companies can install a brand new boiler the next day, such as Boiler Central.

We haven’t heard of any other company doing the same-day installation, but it is entirely possible these days, especially with the competition between installers!

Naturally, you want to find the best boiler in 2021, but the wide range of choices can make the decision difficult.

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Which are the best combi boilers on the market in 2021?

You’ll see plenty of combi boilers in the UK market, but if you don’t know what or who the boiler companies are, you might dismiss them.

A combi boiler is a combination boiler which works your indoor central heating system and hot water in one whole unit without the need for a cylinder to store hot water.

Combi boilers are super compact, so they can easily be stored in a kitchen cupboard.

This means that you’re able to kill two birds with one stone here. Combi boilers also have a high energy efficiency rating of 98% when it comes to heating water.

How does this benefit you?

By saving more money on energy bills and having hot water as and when you need it. Oh, and a toasty warm house!

All this by just getting a brand new energy-efficient combi boiler installed in your home.

For boiler information or a quote – click here

Most Reliable Combi Boilers

To make things easier, we’re going to be listing down some of the best new combi boilers in 2021 of which are the most reliable combi boilers.

The following are our top 5 boilers picks in terms of reliability, value, performance and efficiency.

Best combi boiler 1. Worcester Bosch Greenstar 30i Combi Boiler

worcester bosch greenstar 30i

The Worcester Bosch Greenstar i range is the legendary boiler range that everyone has heard of. There is good reason for it too. This boiler is exceptional at what it does at the right price. Reliable, easy to use and in everyones price range. It’s not the cheapest boiler you can buy, but for that extra £100 or so you can get a whole lot more boiler.

The Greenstar i range is available in different outputs, but we believe the 30i is the one to be getting installed. Just the right amount of power coupled with high efficiency and hassle-free heating – all backed up with a huge 10 years warranty as standard – You can get 12 years with Boiler Central!

Worcester 30i combi boiler

Boiler TypeGas Combi Boiler
Which Recommended?Has Which? recommended status
Boiler Warranty10-year warranty
Output30kW
Energy RatingA Rated
Boiler ControlsWireless heating controls
Smart Thermostat CompatibleYes
Boiler FilterYes – completely free
System CleanseYes – completely free.

Get a fixed quote in 20 seconds on a Worcester Bosch boiler: Click here

Best combi boiler 2. Alpha E-Tec 28kW Combi Boiler

alpha e tec best combi boiler

Alpha Innovations are rapidly becoming a household favourite. These are number 2 on our list due to the outstanding value the Alpha E-Tec range offers. Stainless steel heate exchangers and 10 years warranty mean this boielr is built to last. It may not have the pedigree or a Worcester but can certainly give them a run for their money.

Small and compact in size, this brand’s boilers are earning it recognition.

The following are just some of the quality features that the Alpha E-Tec 28kw has:

Boiler TypeGas Combi Boiler
Which Recommended?No
Boiler Warranty10-year warranty
Output28kw
Energy RatingA Rated
Instant Hot WaterYes
Boiler ControlsWireless heating controls
Smart Thermostat CompatibleYes
Boiler FilterYes – completely free
System CleanseYes – completely free.
Compact DesignYes

Get a fixed quote in 20 seconds on a Alpha E-Tec boiler: Click here

Best combi boiler 3. Ideal Logic C30

ideal boilers

The ideal is another brand that is trusted for the quality of their boilers and judged on their affordability. If you are searching for the best boilers in 2021, you should look at the collection they have available.

best ideal combi boiler

When you get the Ideal Logic C30 combi boiler, you will enjoy the following features:

Boiler TypeGas Combi Boiler
Which Recommended?No
Boiler Warranty10-year warranty
Output30kw
Energy RatingA Rated
Boiler ControlsWireless heating controls
Smart Thermostat CompatibleYes
Boiler FilterYes – completely free
System CleanseYes – completely free.
  • Compact in size, extremely easy to use
  • Winner of Good House Keeping awards – 2013 and 2017
  • 10-year warranty

Get a fixed quote in 20 seconds on an Ideal boiler: Click here

Best combi boiler 4. Worcester Bosch Greenstar 8000

worcester bosch boilers

Worcester Bosch has been hailed as the market leader and for a good reason, they have produced some of the best new combi boiler options for years.

They have consistently produced the best boilers in the UK, and quality products which is why they definitely rank among the best combi boiler manufacturer in 2021.

They have won the Which? award for a few of their boilers, giving you more reasons to purchase a Worcester for your new boiler installation.

So let’s look at one of their best:

The Worcester Greenstar 8000 combi boiler is a great choice… The Greenstar 8000 is one of their best offerings because it offers the following amazing functionality:

best combi boilers worcester bosch 8000
Boiler TypeGas Combi Boiler
Which Recommended?Yes for 2021
Boiler Warranty12-year warranty
Output30kw
Energy RatingA Rated
Boiler ControlsWireless heating controls
Smart Thermostat CompatibleYes
Boiler FilterYes – completely free
System CleanseYes – completely free.
  • Reduced usage and wastage of electricity
  • Has Which? best combi boiler recommendation
  • Protection against frost – if fixed outdoors
  • Filling link – keyless
  • Simple controls for users
  • Instant hot water

Get a fixed quote in 20 seconds on a Worcester 2000 boiler: Click here

Best combi boiler 5. Viessmann Vitodens 100-W

The Viessmann Vitodens 100-w is another brand that is trusted for the quality of their boilers and judged on their affordability. If you are searching for the best boilers in 2021, you should look at the collection they have available.

When you get the Viessmann Vitodens 100-w, you will enjoy the following features:

Boiler TypeGas Combi Boiler
Which Recommended?Yes in 2019
Boiler Warranty10-year warranty
Output30kw
Energy RatingA Rated
Boiler ControlsWireless heating controls
Smart Thermostat CompatibleYes
Boiler FilterYes – completely free
System CleanseYes – completely free.
  • Extremely easy to use
  • Which Recommended best buy in 2019
  • 10-year warranty
  • Sublime German engineering
  • Superb value for money
  • A powerful boiler for less

Get a fixed quote in 20 seconds on a Viessmann 100-W boiler: Click here

Choose From Our List Of Best Boilers

These are the top picks for the best combi boilers in 2019 and 2021. The list is also by no means a complete collection of all the boilers you can find in the market, but they’re the best in our eyes.

Again, we have judged the above best combi boilers for 2021 by metrics of performance, price, warranty, easy boiler installation, and maintenance.

You might have seen most of these brand names in 2018 and 2017 too, but that’s because these brands are renowned for consistently crafting amazing boilers and combi boilers.

Buying a boiler from any of the brands listed above also ensures that even if you don’t pick the models recommended here, you can still walk away with a boiler that will work efficiently and diligently for years to come.

For boiler information or a quote – click here

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Which Combi Boiler is Best in 2021 for you?

When you are taking a look at our top picks for the best range of combi boilers in 2021, always make sure to consider how they will perform in your household.

Picking a new boiler that others recommend without considering their performance can be a recipe for disaster.

Instead, make sure that you pay attention to various factors, including the ones outlined below:

  • Where is the boiler going to be placed? (Indoors or outdoors)
  • How big are the house and what size boiler should you get for your home? – Larger houses will benefit from boilers that have a larger kW capacity
  • What is the water consumption of the house? – If every family member loves a hot bath, make sure you pick a highly efficient boiler that can accommodate this.

By focusing on these major areas, you will be able to find the answer to which boiler manufacturer is best in 2020 and 2021 for you.

What are the recommended boilers available in the UK?

We have covered which combi and system boilers top the rankings, but are these the most suitable to heat homes in the UK? A quick answer is yes!

The UK has average temperatures which do not often even in the deepest of winters fall below minus 10 degrees; therefore, the power required is not as much as a country that has much lower temperatures.

When it comes to boiler testing and best boiler recommendations, Which? are the best known for reviewing many consumer products and boiler reviews are high on their list? 

They showcase the leading boilers on the market each year and feature rigorous testing to come up with a final Best Buy boiler in 2021.

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What boilers do Which? Recommend to purchase?

As briefly mentioned above, Which? Best Buy combi boilers and system boilers are reviewed each year.

Viessmann and Worcester Bosch seem to frequently top the top picks for boilers recently with their leading combi boilers.

Some say that these are the best options on the market at the current time and in terms of customer reviews, boiler engineer recommendations, and professional testing, they all tend to agree.

Most of the Which? Recommended boilers are from boiler manufacturers with high 5 star ratings on review sites such as Trustpilot.

 

 

Frequently Asked Questions

 

What is the best combi boiler for a 4 bedroom house?

The best system boiler for a 4-bed house is the Worcester Bosch Style 8000 35kW combi boiler

best combi boiler 2020Most efficient combi boilers

The most efficient combi boiler for a 4 bedroom house is the Viessmann 050-W 29kW combi boiler.

The most efficient system boiler for a 4 bedroom house is the Viessmann 100-W 26kW system boiler.

 

Best budget combi boilers

The best budget combi boiler is the Vokera EasiHeat boiler. This boiler is perfect for customers who want a well-known brand and a reliable boiler in their home.

The 25kW version of the Vokera EasiHeat is perfect for homes with up to 3 bedrooms, sometimes 4 if there isn’t a high demand for hot water in the property.

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Combi Boiler vs System Boiler – Which One is Best for Your UK Home?

This completely depends on the type and size of the home that the boiler is to be installed.

We would recommend a combi boiler for homes that have 1-2 bathrooms or showers; however, if a home has multiple bathrooms and showers, then a system boiler is a better solution to provide enough hot water. 

System boilers actually store hot water in a cylinder,  making it more available when and if you need it.

Combi boilers, on the other hand, heat hot water on demand which means if there are 3-4 showers running at the same time in a home, then your combi will struggle to meet the demand.

Which is the best combi boiler?

If you are unsure what boiler size is best for your home then take our 9 step boiler fixed cost quote calculator.

This will find you the right boiler for your home, at the perfect size and performance and even a fixed price that you can purchase online by card or get an instant finance decision.


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