Best Combi Boiler throughout the UK (2024): Reviews & Models

If you’re capable of get going with a model new combi boiler arrange, we would provide help to proper now. At GreenMatch we’ll stop hours of clicking by way of quite a few product pages, getting misplaced throughout the technical particulars – instead, we do the leg be simply best for you. 

By ending our quick sort, we’re capable of be a part of you with as a lot as 3 native installers from our trusted neighborhood of execs. They can provide you suggestion and tailor-made quotes so as to study. It’s totally free with no obligation and you’d find yourself a unbelievable value you wouldn’t uncover elsewhere. 

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Each model has one factor distinctive to produce, so to help making a choice we’ve broken down their key choices and costs throughout the following sections. We’ll moreover take a look at completely different decisions and the way one can select the proper measurement in your desires.

How did we choose the best combi boiler?

We know how irritating it might be to hunt out the options you want quickly and simply, that’s why we’ve taken the time to hunt out the best combi boiler for numerous circumstances. No two homes are the equivalent, and the requires you may have for respectable water and heating are essential.

To uncover the best combi boilers, we checked out a ramification of courses and in distinction boiler fashions on provide from various the best-recognised producers obtainable available on the market. We wished to hunt out out which mannequin provided the best for patrons, along with the standing of each model. 

To extra slender down our search we appeared on the next requirements:

By evaluating these elements, from combi boiler critiques from prospects, and installers, researching award-winning producers and doing a market value comparability, we contemplate we’ve found various the top-rated boilers obtainable to place in proper now. If this all seems overwhelming, don’t concern! We’ve squashed all these courses into easy-to-follow guides below, so you’ll uncover merely what you need.

Baxi Platinum Compact combi

• Available CH output: 21.2kW, 26.4kW 
• Available DHW output: 25kW, 30kW, 36kW
• Suitable for: Homes with as a lot as 12 radiators and a pair of bogs 
• Efficiency: 92% and ErP A-rated for heat and scorching water
• Available fuels: Gas
• Warranty: 10-year parts and labour assure

Estimated value (Exc. arrange): £1,300 – £1,700

Gas boilers are essentially the most well-liked various amongst UK homeowners. Figures current that roughly 85% of homes in  England, Scotland, and Wales are associated to the gas neighborhood and use a gas boiler. As combis are the most common form of boiler all through the nation, it’s no shock that there are numerous gas combi boiler decisions spherical.

For homes not associated to the grid, oil or liquefied petroleum gas (LPG) are the most common decisions for fueling their boilers. Electric boilers are one different good completely different, with increased environmental benefits if paired with a renewable vitality provide. They are, nonetheless, typically dearer to run due to better electrical vitality prices.

Electric combi boilers don’t waste vitality or launch CO2 when working. However, they will solely receive zero emissions when {the electrical} vitality powering them comes from renewable sources, akin to photograph voltaic panels.

The best electrical combi boilers don’t waste vitality the least bit, as they boast efficiencies of as a lot as 100%. One model we extraordinarily worth is the EHC Mercury combi, it’s as a lot as 100% surroundings pleasant, can heat central and underfloor heating and is accessible in outputs acceptable for small to medium-sized homes. 

It’s worth remembering, nonetheless, that besides you run {an electrical} boiler on a free, renewable provide (like residence photograph voltaic panels), they’re typically expensive to run given fluctuating electrical vitality prices.  

From an environmental perspective, we’re ready to attract some conclusions on the affect of each form of combi boiler based mostly totally on the fuel they use.

Emission Intensity by Fuel (kilograms of CO2 equal per kWh)
Fuel	England, Scotland and Wales	Northern Ireland
Gas	0.213	0.213
Oil	0.298	0.240
LPG	0.240	0.240
Electricity*	0.225	0.234

Most reliable combi boilers

When looking for a combi boiler you can rely upon, your first indication is likely to be to check the scale of the producer’s assure or guarantee. We always counsel this on account of the additional time a mannequin is eager to protect their product with out price, the additional doable it is to remaining! (why else would they be so generous?)

That’s not all you could look out for though, it is also doable to check purchaser critiques to see how properly these merchandise perform over time and look out for explicit selling elements, akin to ‘stainless-steel heat exchangers’. It could not appear to be lots, nevertheless choosing stainless steel can suggest a long-lasting, higher-performing boiler. 

We’ve listed just a few of our picks for the best combination boilers that you possibly can rely upon for years to return.

Worcester Bosch Greenstar 8000 Style gas combi boiler

If you do some shopping for spherical for the best combi boiler obtainable available on the market it acquired’t take prolonged sooner than you run proper right into a Worcester Bosch – and with good trigger!

This boiler mannequin has an superior standing for long-lasting, award-winning merchandise. We’ve opted for the Greenstar 8000 Style combi proper right here as a consequence of its unbelievable choices. With its huge output fluctuate, this model may very well be the best combi boiler for a 3 mattress residence. 

It comes with a warranty of as a lot as 12 years, an effectivity worth of 94% and a ramification of outputs to go effectively with every small and large homes – meaning it ticks a complete lot of containers. Not solely can you depend on it for a minimum of 12 years, with out the concern of any breakdown costs, but it surely absolutely’ll moreover stop money with its extreme effectivity and optimum measurement fluctuate. Plus – it seems to be like pretty modern!

Customers give Worcester Bosch a generous 4.6 out of 5 on Trustpilot, rating them ‘Excellent’ for over 40,000 critiques. Reviews fluctuate from fantastic buyer help to quick, quiet and surroundings pleasant boiler fashions.

Ideal Vogue Max combi boiler

Another excessive contender, should you occur to’re looking for most likely essentially the most reliable combi boiler, is the Vogue Max from Ideal Heating. This clean model boasts that all-important stainless-steel heat exchanger, for prime corrosion resistance and flawless effectivity all via its lifetime. 

In addition, Ideal presents a ten to 12-year assure for added reliability and security. Ideal prides itself on using premium provides and consists of particulars to ensure your boiler lasts. For occasion, the Vogue Max moreover consists of frost security and the Ideal system filter, to protect your heating from day 1.  

With a extreme effectivity of 93% and good compatibility, you can merely administration this boiler to help optimise your heating, reduce vitality waste and get financial financial savings on funds. 

Customers give Ideal Heating 4.8 out of 5 on Trustpilot, an ‘Excellent’ rating from over 40,000 critiques. Customers commented on the fantastic service and helpfulness of their engineers, and the way in which quick these fashions are to swimsuit and restore.

Viessmann Vitodens 100-W combi boiler

Viessmann is one different extraordinarily acclaimed mannequin, with a well-earned standing for long-lasting boilers. The Vitodens 100-W combi boiler comes with a ten – 12 12 months guarantee chance, a stainless steel heat exchanger and a extraordinarily surroundings pleasant, low pollutant burner (the MatriX Plus). 

With a ramification of output sizes, this boiler can serve homes with as few as 10 or as many as 20 radiators, and as a lot as 2 bogs. With its A-rated effectivity, it’s going to moreover waste a lot much less fuel and save on vitality funds. It moreover is accessible in as among the many finest compact combi boilers, good for saving home. 

Customers rated Viessmann UK a 4.2 on Trustpilot, with merely over 7,000 critiques (although the company does span many countries). Comments level out how these boilers surpass expectations, heat water super quickly and have a clean design. 

Best cheap combi boiler

So far, we’ve checked out some premium boiler producers that provide various the best combi boiler decisions obtainable available on the market. With this extreme standing, nonetheless, sometimes comes the subsequent ticket and for lots of householders, that’s merely not going to work. So, what are the best combi boilers for these on a funds? 

Keeping in ideas various the important thing requirements that make a boiler good, we’ve found 3 combi boilers that will provide extreme effectivity and effectivity, nevertheless can be found on the lower end of the value fluctuate. Generally speaking, looking for a boiler beneath £1,000 will limit your choices, and may be notably robust if in case you have got a much bigger residence which desires a additional extremely efficient boiler.

For our excessive picks, we’ve included boiler fashions which can be found a ramification of sizes. This can affect costs, nevertheless we’ve included an estimated new boiler worth fluctuate to current you a suggestion decide. Here are our picks for the best cheap combi boilers.

Boiler Model	Outputs	Price  (Exc. arrange)
Baxi 200 combi 2	24kW, 28kW	£650 – £900
Alpha E-tec Plus	28kW, 33kW, 38kW	£700 – £1,000
Baxi 400 Combi 2	24kW, 30kW	£850 – £1,000
Worcester Bosch Greenstar 2000	25kW, 30kW	£850 – £1,200

Best vitality surroundings pleasant combi boiler

If saving vitality, decreasing CO2 emissions and defending the planet are on the excessive of your priority guidelines, then you could think about discovering the best vitality surroundings pleasant combi boiler. In phrases of fuel kind, the electrical boiler is by far most likely essentially the most surroundings pleasant boiler, with 99-100% effectivity scores – means over any gas or oil condensing boiler. 

We know that gas boilers are the most common form of boiler in UK homes, nevertheless switching to {an electrical} combi boiler may drastically reduce your carbon footprint. This is on account of they flip 100% of the ability from electrical vitality into usable heat (i.e. 1kW {of electrical} vitality equals 1kW of heat). 

One issue you wish to keep in mind, nonetheless, is that besides your electrical vitality comes from a renewable provide, there are better costs involved – electrical vitality generated from fossil fuels has a giant environmental affect and using additional electrical vitality will inflate your frequent bill costs. It is possible to generate clear residence heating with {an electrical} combi boiler though, should you occur to pair it with photograph voltaic panels as an illustration.

We checked out obtainable electrical boilers obtainable available on the market proper now and chosen our excessive select to be the Electric Heating Company (EHC) Mercury combi boiler. 

The trigger we chosen this model is on account of it presents a wide range of output sizes, making it acceptable for numerous property sizes. It moreover comes with some good choices that make it a company contender in opposition to its gas or oil counterparts. Some of its choices embody:

• Outputs of 12kW, 14.4kW (single part – for small properties)
  19kW, 26kW (three part – for larger homes)
• Compatible with central heating and underfloor heating
• Includes 5-year guarantee
• 100% vitality surroundings pleasant (no vitality is misplaced)
• Includes summer time season and winter modes to help save vitality
• Silent operation 

Prices fluctuate from £1,530 – £1,850 (excl. arrange)

If you’re not capable of make a full swap to a renewable vitality provide and are looking for vitality surroundings pleasant gas boilers, we’ve acquired that lined! Although most stylish condensing combi boilers are spherical 90% surroundings pleasant, some producers have created fashions that go even better. The desk below lists various one of the best gas boiler fashions, with an indication of their value fluctuate.

Combi Boiler model	Efficiency	Price  (Exc. arrange)
Viessmann Vitodens 100-W	Up to 98%	£1,200 – £1,400
Vaillant ecoTEC plus	94%	£1,500 – £1,880
Worcester Bosch Greenstar 8000 Style	94%	£1,600 – £3,000

Best combi boiler by vitality output

Boiler output, measured in kilowatts (kW), refers to how extremely efficient the boiler is and what variety of radiators or taps it may truly present with scorching water. Output is normally often called ‘boiler measurement’ on account of the higher the output, the larger the home it is acceptable for.  

In basic phrases, the additional kilowatts a boiler has, the additional scorching water it may truly present. It’s truly essential that your boiler measurement is true in your residence – if it’s too low, you acquired’t get adequate scorching water in your desires, however when it’s too extreme you’ll end up paying over the possibilities for the vitality to fuel it. 

With this in ideas, we’ve summarised the proper output sizes below so as to ponder. It is always actually helpful, nonetheless, that you just simply get expert suggestion from a heating engineer sooner than shopping for your boiler so that you just simply get the exact measurement in your distinctive circumstances.

Approximate Combi Boiler Sizes
House Size	Combi Boiler Size
Flat or residence with decrease than 10 radiators (1 mattress room)	Up to 20kW
Houses with as a lot as 10 radiators (as a lot as 4 bedrooms)	24 – 27kW
Houses with 10 -15 radiators (4 to 5 bedrooms)	28 – 34kW
Houses with 15 – 20 radiators (5+ bedrooms)	35 – 42kW

When we checked out the best combi boiler fashions obtainable available on the market, we seen that there is a fluctuate of decisions obtainable to go effectively with most houses. Many of the boilers we have already talked about provide fully completely different output sizes that make them good for numerous homes.

Best small combi boiler

If you might have a small flat or 1-bedroom residence, with 1 toilet, it could be finest to seek for a smaller-sized boiler (in terms of output). The fewer radiators and taps/retailers your property has the a lot much less oomph your boiler desires. 

Fortunately, various the best boiler producers do provide fashions which are obtainable lower output sizes, or which can be adjusted to suit your desires. During our evaluation, we found that the best small combi boiler model was Vaillant’s ecoTec Plus 825. 

This boiler has a CH output between 4.2 – 20.4kW and a DHW output of 25.4kW, making it good for the smallest of areas. It moreover comes with Vaillant’s signature choices like A-rated, 94% effectivity, ultra-quiet (award-winning!) operation and as a lot as 10 years guarantee. Like all Vaillant boilers, it’s moreover ready for a 20% hydrogen gas combine for future environmental security.  Prices fluctuate from £1,200 – £1,400.

Of the fashions included above, there is a fluctuate of prices based mostly totally on the size of boilers obtainable. Each product is an occasion of among the many finest boiler producers at current obtainable available on the market and, because it’s doable you may rely on, the additional premium the mannequin the higher the costs will rise. The good news is, nonetheless, that lots of these producers do now provide lower-cost alternate choices – notably various the Baxi and Ideal ranges – which are worth wanting into.

Best combi boiler beneath £1,000

If you are on a restricted funds, or looking for low-cost boilers nevertheless have to get the easiest chance, we propose you check the fashions obtainable from Baxi. They at current provide a ramification of combi boilers that provide you with additional choices the additional you pay, which is nice for these looking for low costs and no-frills.

No matter which boiler you check out though, be able to sacrifice choices the cheaper you go – as an illustration, warranties will sometimes be lots shorter on cheaper merchandise.

Here is a check out one in every of many cheaper Baxi combi boilers:

Baxi 200 assortment

• Available CH output: 21.8kW
• Available DHW output: 24kW, 28kW
• Suitable for: Homes with as a lot as 10 radiators and 1 toilet
• Efficiency: 93% and ErP A-rated for heat and scorching water
• Warranty: 2-year parts and labour assure

Estimated value (Exc. arrange): £650 – £900

Combi boiler arrange worth