Best Combi Boilers – Which is the best combi boiler to buy?

best combi boiler 2021
best combi boiler worcester 8000

The best combi boiler to buy is very dependant on your home but we’ve picked out the best based on the average home. Some combi boilers aren’t something that everyone knows something about so we’ve picked out some of the best combi boilers on the market from leading boiler brands. You may have heard of some of the top brands such as Worcester Bosch or Ideal, but there are some other excellent brands out there too. 

Best combi boilers 2021 – The best combi boilers this year so far

There are at least 100 different replacement combi boilers available from different boiler brands, but we’ve managed to whittle it down to the 6 best boilers. We have chosen these boilers based on numerous things that are key features in combi boilers and obviously taken new boiler cost and value into consideration too. 

Our top 6 best combi boilers in the UK chosen by us

best combi boiler vitodens 050-w
  1. Viessmann Vitodens 050-w combi boiler
  2. Worcester Bosch 2000 combi boiler
  3. Ideal Logic combi boiler
  4. Worcester Bosch 8000 combi boiler
  5. Viessmann Vitodens 100-w combi boiler
  6. Vaillant ecoTEC combi boiler

As you can see from the list of boilers that there are 2 brands there that have 2 boilers in our list. There’s a good reason for this as they make some fantastic boilers which we will pick apart further on in this post to find out why.

You can get all these combi boilers installed the next day by a Gas Safe registered engineer with Boiler Central, all at a fixed price online.

Best boiler brands for combi boilers from sales in the UK

As we have picked out different combi boilers from certain boiler brands, if you are interested in which we believe are the best boiler brands to buy from so you can browse their boiler range then here is our shortlist.

best combi boiler worcester logo
  1. Worcester Bosch
  2. Viessmann
  3. Ideal
  4. Vaillant
  5. Baxi
  6. Alpha Innovations
  7. Glow-Worm

Choosing from the best combi boiler brands

All these top brands manufacture excellent energy efficient combi boilers. They all offer a few different ranges, generally from an entry-level boiler to a top of the range boiler, all in different outputs. This enables them to have a wider reach over the new combi boiler market and offer a boiler suitable for every home in the UK.

Choosing the best combi boilers – How we do it

best combi boiler inside combi boiler

With years of experience and knowledge, we know exactly what to look for in a good boiler. But we also take into consideration how well a boiler sells and any feedback and review from sites such as TrustPilot. We know people like to take other peoples experiences seriously and can be a big factor in peoples decision making. 

Comparing the best combi boilers – Things we consider

Here is a list of things we take into account when assessing how good a combi boiler is. These are what we believe you should look for in all boilers before considering your replacement. 

  • Boiler Specifications
  • Price of the combi boiler & value for money
  • Length of boiler warranty
  • Online reviews
  • Online reports or issues raised
  • Customer service and aftercare

The best combi boilers should score highly in all these areas and provide you with years of hassle-free heating and at a great price.

#1 Best combi boiler – Viessmann Vitodens 050-w 

To take the top spot off Worcester Bosch in our combi boiler review it needed to take something pretty special. And we believe the Viessmann Vitodens 050-w combi boiler has it all, and is the best combi boiler available on the market in terms of unrivalled specification and value for money. 

Why is the Viessmann Vitodens 050-w the best combi boiler?

In short, the amount of boiler and extras you get for the money with the Vitodens 050-w is unbeatable. This brand new combi boiler for 2021 comes with built-in wifi, is hydrogen ready, fits in kitchen cupboards and looks great. Also, hailing from German giants Viessmann, these combi boilers are super reliable and come with a massive 10 years warranty as standard all for under £1,800.

best combi boiler vitodens 050-w combi

Viessmann 050 best bits and why to buy

  • Superb value for money
  • Fantastic spec and performance
  • Great parts and labour 10 years warranty
  • Viessmann are the largest boiler manufacturer in Europe
  • Super efficient boilers
  • Compact and lightweight
  • Great new looks
  • Great reviews online from customers
  • Excellent aftercare service
  • Built in Wifi
  • Hydrogen ready

If you like the sound of this fantastic combi boiler you can get a quote online now with companies such as Boiler Central in under 20 seconds.

#2 Best combi boiler – Worcester Bosch Greenstar 2000 

If you know anything about combi boilers, then you will now be surprised to see a Worcester Bosch combi boiler near the top of our list. If you don’t know anything about combi boilers, then in short, Worcester Bosch are like the Nike sportswear brand for boilers. They churn out quality boilers year in year out and have dominated the UK boiler market for over 10 years with their now discontinued Greenstar i range.

best combi boiler worcester 2000

Why is the Worcester 2000 the 2nd best combi boiler?

  • Great spec with energy and water-saving features
  • Fantastic value for money at around £1,695 with installation
  • Good warranty at 6 years
  • Great online reviews from customers
  • Has been a best selling boiler since its release in 2019
  • From one of the best manufacturers
  • Comes in 2 different outputs of 25kW and 30kW
  • Fits in kitchen cupboards
  • Quiet Mark accreditation
  • Easy to install and maintain – Side panels can be removed
  • Great aftercare from Worcester Bosch
  • Hydrogen ready

As we have said Worcester Bosch is one of the best manufacturers in the UK, and if you think the Worcester 2000 is the boiler for you then you can get a quote on this boiler now in under 20 seconds online with Boiler Central.

#3 Best combi boiler – Ideal Logic combi boiler

The Ideal Logic combi boiler seems to be around forever, and there’s a good reason why it has stood the test of time. It’s a low cost, reliable and compact combi boiler that suits most peoples homes and budgets. It is one of the most installed boilers in the UK and is the choice of new-build contractors across the UK due to its energy efficiency. 

best combi boiler worcester ideal logic

Why is the Ideal Logic our 3rd best combi boiler?

  • Great value for money at less than £1,800
  • Very reliable boiler
  • Comes with a good warranty
  • Is compact, one of the best for kitchen cupboards
  • Easy to install
  • Quiet Mark accreditation
  • One of the best selling boilers ever
  • Available in 3 different outputs 25kw, 30kw and 35kw
  • Hydrogen ready
  • Great aftercare

The Ideal Logic combi boiler is a perfect choice for small to medium-sized homes across the UK. You can price one up online in under 20 seconds with Boiler Central now.

#4 Best combi boiler – Worcester Bosch 8000

This combi boiler is the best combi boiler that Worcester Bosch manufacture. The 8000 has everything including style. It is designed the opposite to most combi boiler and made to be on show and not hidden away. The gloss black style range is quite a thing of beauty, for a boiler anyway. The Worcester 8000 is super powerful, reliable, and comes with a huge 12 years warranty. The only thing that stops this from topping our poll which we are sure you can guess, is the high price tag. 

Why is the Worcester 8000 our 4th best combi boiler?

best combi boiler worcester 8000

In terms of value for what you actually get with the Worcester 8000, it is good value for money, but essentially, it still can only heat up your hot water and radiators the same as the other combi boilers in this list. 

At around £2,400 with installation, it’s over £700 more than the Worcester 2000 which will do the same job. On the other hand, the 8000 uses premium parts, has built-in Wifi and looks fantastic, and is backed up with a 12-year guarantee. 

  • Available in 6 different outputs 25kw, 30kw, 35kw, 40kw, 45kw & 50kw
  • Hydrogen ready
  • Excellent aftercare
  • Comes in 2 different colours

The Worcester 8000 is one of the best boilers ever made in terms of technology, if you can afford the hefty price tag, then get a quote here online in 20 seconds with Boiler Central. If this combi boiler is a bit pricey, why not check out the Worcester 4000 instead.

#5 Best combi boiler – Viessman Vitodens 100-w

best combi boiler viessmann vitodens 100-w

The bigger brother to the Viotdens 050-w makes our list, and for very good reason. It’s a powerful reliable combi boiler with a fantastic 10 years warranty. This German engineered boiler is reliable as sin and will give you years of hassle-free heating. One of the main things about the Vitodens 100-w is that it is in direct competition with the Worcester 8000 but is about £150 cheaper. So if you prefer substance over style, then this is perfect for you.

Why is the Viessmann 100 the 5th best combi boiler?

  • Even with a price tag of around £2,250 with installation is still good value
  • Long warranty
  • Built-in Wifi
  • Hydrogen ready
  • Extremely reliable
  • Excellent aftercare
  • Available in 3 different outputs

If you think this boiler is perfect for your home then get a fixed price online now with Boiler Central online in under 20 seconds.

#6 best combi boiler – Vaillant ecoTEC 

Vaillant is another well-known boiler brand that continues to push the boundaries in the search for ever more energy-efficient boilers. Vaillant is the cheapest in terms of combi boilers, but their build quality makes them an excellent choice. Their ecoTEC exclusive with Green IQ is one of the most energy-efficient boilers. 

best combi boiler vaillant ecotec green iq

Why is the Vaillant ecoTEC the 6th best combi boiler?

  • Super reliable boilers
  • One of the most energy-efficient boilers
  • Great aftercare
  • Long 10 years warranties
  • Very powerful combi boilers
  • Available in 2 different outputs 35kw and 43kw
  • High flow rates of 17.8 litres/min
  • Quiet Mark accreditation

Are you looking for one of the best boilers that Vaillant make? Get a great price on this boiler online now with fixed quotes in under 20 seconds with Boiler Central. 

What makes a good combi boiler?

A good combi boiler should produce hot water efficiently and instantly. Energy efficiency is the key as the more efficient it is the lower your gas and electricity bills will be. A combi boiler must run at over 90% efficiency. Some of the best combi boilers will run at over 95% efficiency. As manufacturing processes improve and technology advances, combi boilers are becoming more efficient for longer.

Good combi boilers for your home depend on the size and output

Good combi boilers for your home depend on the size of your home and hot water demand. If your boiler is too big for your home in size and output then you may be using more gas and electricity than necessary, hence making an efficient combi boiler, inefficient. The same applies to good combi boilers for larger homes. If your combi boiler is too small, then it may have to work overly hard to keep up, therefore costing more on your utility bills.

Best central heating boiler that can heat your radiators and hot water efficiently

Choosing the best central heating boiler is quite dependent on your home and your hot water demand. A boiler that is too powerful is unnecessary and a boiler that isn’t powerful enough will not warm your homes central heating or hot water to the desired temperatures.

However, for the average home, you should expect to a combi boiler with an output of 30kw would be perfect. Most of the combi boilers in our list such as the Viessmann Vitodens 050-w, the Worcester 2000 and the Ideal Logic all have boilers that have an output of 30kw. 

best combi boiler trustpilot reviews

Any of these boilers would be perfect for small to medium-sized homes’ central heating. 

Best combi boilers review conclusion

As you can see from our review, there is very little between the top combi boilers in the market. It does almost come down to personal preference or recommendation. The Viessmann Vitodens 050-w has a much better specification for the money, but the Worcester Bosch 2000 has the boiler brand edge.

If you are still unsure which model you should get from each range, simply use Boiler Central’s online quote tool and get a boiler that is perfect for your home in under 20 seconds.

Get a Quote in 20 SecondsClick here >