5 Best Boiler Companies For Your Homes! (reviews & Faqs)

The essentials for the perfect boiler.

Boilers help in the production of steam. The production part of a steam system uses a boiler to add energy to a feedwater supply to produce steam. The energy is released from the burning of fossil fuels or from process waste heat. We need to look for Boilers that are fuel-efficient and affordable. Boilers should spot a modern yet modest look so it won’t look awkward in your homes. In a utopian society, there would be a boiler of one size that fits into all standards and provide a one-time solution but, sadly, this isn’t the situation. Each home is unique, boilers should be created to suit the priorities of each home in terms of size and types. When it comes to discovering a flawless boiler, many significant things need to be taken into consideration, such as the budget and size of your property, heating, and hot water necessities. A boiler has two key roles: to heat the air inside a house and to heat the house’s water. It does this by burning fuel -oil or gas and makes boiling water. Some of this water feeds the plumbing system when the faucet is turned on. But it also pours through an organization of closed pipes and radiators throughout the house, transferring the warmth to the air. As the water cools down, they pump it back into the boiler to undergo the same process again.

Check out these 5 best boiler companies that would help you to have a perfect bath.

  • Biasi Riva Plus system ERP boilers
  • Glow Worm EasicomSystem Boilers
  • Worcester Bosch Greenstar Danesmoor  regular boilers
  • Vaillant ecoTEC Plus Combi Boilers
NameOur ratingAvailabilityPriceOutputEfficiency
Glow Worm Easicom System Boilers  8.8/10YES£622.74    25 kWA- 94%
Biasi Riva Plus system ERP boilers  7.5/10YES£ 450.0024 kWB-86-90%
Worcester Bosch greenstar Danesmoor  regular boilers  7.9/10YES£ 1,500.00  18 kWA-100%
Vaillant ecoTEC Plus Combi Boilers  9/10YES£ 1,395.0025.4kWA-100%

    I. Glow Worm EasicomSystem Boilers

NameOur ratingAvailabilityPriceOutputEfficiency
Glow Worm Easicom 24 System Boilers     Glow Worm Easicom 28 System Boilers  8.8/10           8.9/10YES           YES    £ 622.74           £ 650.74  24 kW         28 kW93%           A-94%

The Glow-worm Easicom3 System provides an outstanding heating routine when installed with a boiling

water storage cylinder. Anyone with some great control options can easily use the system. The Glow-Worm Easicom Combi Gas Boilers come with a diversity of controls, and extra add-on performance improves. A pre-fit analog clock and a horizontal flue are present, but the mobile phone app-based control can be added. The app permits you to regulate your heating and hot water system wherever you are.



  • Ultra-quiet operation

•      Easy usage and servicing

•      High-grade aluminium heat exchanger–dependable performance

•      Delivers supreme energy efficiency and helped reduce the fuel bills.

•      Improved efficiency and performance. Parts and labor guarantee for 3 years with the option to extend.

•      Smart design to suit modern homes

•      Includes a spacing frame and pipe cover plate

•      High efficiency rate

•      Well-matched with the MiGo app-based control – take full advantage of efficiency, gain your energy needs, and permits you to achieve your heating and boiling water requirements


•      Glow-worm boilers have an overall score of 54%

  • 3-year warranty – would prefer a longer standard guarantee

•      Causes separate cylinder


  • LCD display – Bright LCD display with an easy-to-use interface.
  • Heating output- 25 kW
  • Fuel source- gas
  • Dimensions- 740mm (H) x 480mm (W) x 338 (D)
  • Fuel source- gas
  • Maximum flow rate: 9.8 l/min, 11.5 l/,minS

Product specification:

  • Article number: 0010020902
  • Gas council number: 41-019-49

II Biasi Riva Plus system ERP boilers

NameOur ratingAvailabilityPriceOutputEfficiency
Biasi Riva Plus system ERP 24 kW boilers  
Biasi Riva Plus system ERP 28 kW boilers  
8.8/10           8.9/10YES           YES    £450.00           £480.0024 kW           28 kW93%           A-94%

Biasi Riva Plus system ERP boilers This B rated energy resourceful boiler is an impenetrable system-heating only boiler which eradicates the need for a feeder tank helping you save treasured loft. The Biasi technology includes a customary heat burner along with a high competence main heat exchanger, it uses both traditional and modern methods to deliver heat for your homes.



  • Energy efficient
  • Easy to store
  • Low gas bills
  • Copes with temperature fluctuation
  • Easy upkeep
  • Modest user friendly control panels


•      Suitable only for small and medium houses

  • Efficiency less when compared to other models


  • Built in Frost Protection
  • Compact Measurements
  • Anti-seizure technology
  • High-efficiency main heat exchanger
  • 2 year warranty
  • Simple controls
  • Product Dimensions : H – 600 MM, W – 375 MM, D – 285 MM
  • SEDBUK Band B

III. Worcester Bosch Greenstar Danesmoor regular boilers

  1. Worcester Bosch greenstar Danesmoor regular boilers
NameOur ratingAvailabilityPriceOutputEfficiency
Worcester Bosch greenstar Danesmoor regular 18kW boilers   Worcester Bosch greenstar Danesmoor regular 25 kW boilers      8.8/10         8.9/10           9/10YES         YES           YES£ 1,500.00         £ 1,570.80                     £ 1,866.9324 kW         28 kW         32kW            93%         A-94%           A-95%

With a SEDBUK efficiency rating of 90.7%, the Greenstar Danesmoor Regular is an A-rated boiler that has been endorsed by the Energy Saving Trust.

Not only will it help to reduce your energy bills but this appliance will play its part in lowering your carbon footprint.



  • Range of heating outputs – perfectly suited to most homes
  • Perfect for the kitchen or utility room
  • Optional 7-day programmer available for greater comfort and energy efficiency
  • Can be used with Greenskies solar panels for energy and cost savings
  • Compatible with Greenstore hot water cylinders
  • Extremely quite


  • Need for hot water cylinder additionally.
  • Low output for high price
  • Need for tank on loft in addition to boiler


  • A-rated conventional boiler
  • Simple heating control
  • 2-year parts and labor warranty
  • Dimensions: H – 855 mm, W – 370 mm, D – 600 mm
  • Output: 24kW, 28kW, 32kW
  • Compatibility with green skies water panel and green store hot water cylinders

VI. Vaillant ecoTEC Plus Combi Boilers

NameOur ratingMaximum DHW flowPriceOutputEfficiency
Vaillant ecoTEC Plus Combi Boilers 825  

Vaillant ecoTEC Plus Combi Boilers 832  

Vaillant ecoTEC Plus Combi Boilers 835  

Vaillant ecoTEC Plus Combi Boilers 838






£ 1,185.65
£ 1,263.53

£ 1,395.00
25Kw      32kW       35kW       38kW          A-89.3%       A-89.3%       A-89.3%       A-89.3%    

A solid condensing combination boiler with a wide range of hot water flow rates from 10.5 to 20 liters per minute, with outputs ranging from 25kW to 38kW. The brilliant performance, reliability, quiet, and ease of use make it Vaillant’s special boiler. Delivers with immediate hot water without any aid from a hot water cylinder or a cold water tank.



  • Efficient and a high performer
  • Affordable fuel bills
  • Fast delivery of hot water
  • 5 year guarantee
  • Least energy consumption
  • Ultra-quite in operation
  • Eco-friendly
  • Needless of a storage tank or cylinder


  • Suitable for small and medium houses


  • 25, 32, 35 or 38kW heating outputs combination models
  • Hot water and heating efficiency rated ERP A
  • Dimensions: H: 720 x W: 440 x D: 338
  • LPG can also be used
  • Modulation range: tp,1:6
  • Ultra-Quiet
  • LED display
  • Aerothermal air to the water heat pump
  • Eco friendly with 85% recyclable materials

Buying guide Boilers:

There are three main boiler types:

1.    Combi boilers

2.    System boilers

3.    Regular boilers

Understanding each boiler type is important to identify the one suitable for your house. The prices listed do not include the installation fare.

Combi Boilers:

Combi boilers or combination boilers do not need a separate hot water cylinder, instead deliver water from one solid unit. They are easy to install and cheaper than the other models and therefore popular among customers. It is best suited for smaller house with a wide range of kW outputs. The disadvantage includes the impossibility of the boiler to cope up with two showers or baths running simultaneously, not suitable for houses with many bathrooms.

The advantages of combi boilers include:

•      Prompt and limitless hot water

•      Energy efficient

•      No cylinder or tanks essential

•      Easier to install

System Boilers:

System boilers are ideal for houses with multiple bathrooms and great demand. They can provide a constant supply of water to all the units within a house. It requires a separate water cylinder for the storage of hot water, but they don’t need extra tanks. Like combi boilers, system boilers are easy to install energy efficient to run.

The advantages of system boilers include:

•      Provides hot water to multiple taps ideal for large house

•      Installation quick and easy

•      No need for separate tanks

•      Solar thermal solutions

Regular Boilers:

Areas with low water pressure and homes with multiple bathrooms are ideal for regular boilers, also known as conventional or heat only boilers. They are best suited for homes with loft space and airing cupboard as they need a feed, expansion tank, and hot water cylinder. They provide a steady supply of hot water.

The advantages of regular boilers include:

•      Perfect for larger houses with two or more bathrooms

•      Simultaneously, provides water to multiple taps

•      Suited for homes with a traditional central heating system

•      Well-suited with solar thermal solutions

Best UK Boiler Brands

With the large amount of options available in the market today, it is difficult to pinpoint the right boiler for your homes. Most boiler companies provide generous solutions to UK homes. These are our selection based on reputable brands:

•      Worcester Bosch

•      Viessmann

•      Vaillant

•      Ideal

•      Potterton

•      Glow-Worm

What do experts have to say?

It is significant to guarantee that a boiler’s Power Rating (or size) is just right;

•      An undersized boiler might work too hard, and an oversized boiler may work below capacity. Both circumstances can lead to more fuel being used than needed.

•      A heating engineer analyses the dimension of the boiler needed based on; heat loss, the number of rooms (Bedrooms, bathrooms, etc.), number of people in the property, number of radiators, showers, etc.

•      Smaller houses and flats, with up to 10 radiators, will need a 24-25kw boiler. A 28-30kw would be installed for a medium to large 3-4 bed house with up to 15 radiators, and a 33-35kw and a 40kw would be for a large house with up to 20 radiators.

•      In enormous properties spread over several floors over one boiler would be essential.

Boiler Manufacture

•      There are abundant boiler brands/manufacturers. Each one has an advertising strategy to trade their product. As a customer, it’s hard to tell which is “the best” or the right one for you.

•      The hunt for “the best” is often problematic by heating engineers having a preferred boiler manufacturer that they like to install. They will each say that their proposal is better than the others.

•      The cynical might suggest Heating Engineers prefer one brand over another because that is where they can make the most mark.

•      Maybe one brand is less likely to become incorrect than another, one brand is easier to install than another, or that the engineer is just more familiar with a particular brand than another.

•      A Gas Safe engineer will install a gas boiler of any brand, but it’s worth paying attention to why they endorse one brand over another. Quite often it will be because they can offer an extended warranty on that boiler brand.

Research & methodologies used behind in-depth analysis of best boiler:

    I. Glow Worm EasicomSystem Boilers

Erp efficiency: 94%

Erp decibel rating: 51dBa

PCDB seasonal efficiency: 89.7%

The Easicom₃ system boiler has been designed with quality in mind. The Easicom₃ range comes with a powerful aluminum heat exchanger and has leading features including a bright, easy-to-read, LCD display and comes with a 3-year guarantee with options to extend through Club Energy.

II. Biasi Riva Plus system ERP boilers

Erp efficiency: 86%

Erp decibel rating: 49dBa

PCDB seasonal efficiency: 85%

The Biasi Riva plus System ERP can be bought for as little as £496 inclusive of VAT and is the most affordable heat only boiler Biasi have ever produced. It comes with a comprehensive 2 year warranty covering parts and labour (subject to terms and conditions). The Biasi Riva plus System boiler can be purchased in either a 24KW or a 28KW size.

III. Worcester Bosch Greenstar Danesmoor  regular boilers

Erp efficiency: 90%

Erp decibel rating: 56 dBa

PCDB seasonal efficiency: 90%

The Greenstar Danesmoor Regular is a conventional floor-standing oil-fired boiler, available in outputs of 18kW, 25kW and 32kW.This appliance is part of Worcester’s high-efficiency boiler range and designed to be used with a cold water storage tank and a hot water cylinder. It measures 855mm (H) x 370mm (W) x 600mm (D) and will fit neatly between your kitchen or utility room units. For a complete Worcester solution and to increase water performance, the boiler can be set up to work with a Greenstar hot water cylinder.Ideal for small, medium, and large homes, the Worcester Bosch Greenstar Danesmoor Regular comes with a 2-year manufacturer warranty

    VI. Vaillant ecoTEC Plus Combi Boilers

Erp efficiency: 100%

Erp decibel rating: 45dBa

PCDB seasonal efficiency: 90%

Every home is different. But the ecoTEC plus, with its range of heating outputs, is so flexible it can meet the demands of a whole range of homes and different lifestyles. That’s why it’s our flagship boiler. Our goal is always outstanding performance: low energy consumption for hot water and central heating – and lower fuel bills for you. The ecoTEC plus is smart: when it knows you don’t need as much heating power, it can drop to using 16% of its maximum power saving on fuel and money. Because we know that’s what you want from your boiler. You want it to be efficient, easy to use, reliable, and quiet.


Safe and Simple Ways to Check for Boiler-Related Problems

By executing simple checks, not only could you spot minor boiler glitches before they turn into grave issues but you may also be able to evade calling out a registered engineer.

Six safe checks you can carry out if your boiler isn’t functioning correctly.

Check for problems with your gas supply

When your boiler stops operating, there’s always a chance that your gas supply is triggering the issue, than your actual boiler. To understand whether you have an issue with your gas supply, make sure your gas stopcock is switched on and then check if your other gas appliances are operational. If you find that all of your gas appliances are refusing to work as well, it could be a gas supply problem that is affecting the area where you live. In this instance, you’ll need to contact your gas supplier.

Check that your water supply is switched on

Your boiler may not be operating properly because you might have unintentionally turned off your water supply, so it’s always best to check that it’s still switched on. You may find that you didn’t turn off your water source at all, in which case you should turn on your taps to see whether water is flowing out of them. If water is not coming out of the taps, get in touch with your water provider for help.

Check for difficulties with the power supply

If your boiler is plugged in but is not turning on, there may be a problem with the power supply and you will need to contact your electricity provider. However, if there has been a power cut and your boiler has lost your chosen settings, the fix may be as simple as resetting your boiler. To make sure your boiler is functioning properly, set it to turn on your heating in a few minutes time. If it does as you asked, simply chose your preferred settings to enable your boiler to behave as it did before the power cut occurred.

Check that the pressure of the boiler is set to the correct level

It is essential that your boiler has the right amount of pressure so that your hot water can circulate around your property. If the pressure is too low, your boiler will switch itself off and you’ll be left without any hot water. But if it’s too high, it causes unnecessary strain on the boiler and forces your system to break down. You can find out the required pressure for your boiler by reading the manufacturer’s manual, which will also tell you how to re-pressurize and bleed your boiler if it is, in fact, below or above the correct level. If the pressure is fine when you initially check it, you should call your gas supplier or a Gas Safe engineer.

Check the thermostat of your boiler

It’s always worth checking your boiler’s thermostat to ensure it’s still in the on position and set above room temperature. If it works on a timer and the clocks have gone backwards or forwards recently, you may need to adjust the settings. You may even find that the thermostat has failed and needs to be substituted.

Check for frozen pipes

All condensing boilers have a condensate pipe, which should lead outside of your home so that the acidic water can run into a drain. When it’s cold outside, your condensate pipe can become frozen and cause your boiler to shut down. Most modern boilers will warn you when this happens by displaying a fault or error code. Pouring warm (NOT boiling) water onto the frozen pipe will help to thaw it, but we recommend you call out a Gas Safe engineer if you would rather not do this yourself or this common boiler problem persists.

Boiler still not working?

If your boiler is faulty and you can’t find anything wrong with your gas, water, power, boiler pressure, thermostat or pipes, you have no other choice but to contact a professional. You must check that your chosen engineer is Gas Safe registered as this confirms that they’re legally allowed to diagnose problems and work on your boiler.

Stories from the real world usage:

    I.Glow Worm Easicom System Boilers

Reviewer: Ian M

Rating: 4/5

Date and Place of review: the United Kingdom on November 16, 2020


We had a slight leak from one component in the boiler. The engineer came, confirmed the faulty part, and ordered a replacement. As soon as the replacement was available the engineer returned and fitted the part explaining exactly what he needed to do and why.
Throughout the process, the level of communication was very good and we were not left wondering what was happening. Even when the part was delayed the engineer contacted us to explain the delay.
Very good all-round service.

II. Biasi Riva Plus system ERP boilers

Top review:

Reviewer: Aboobaker Mundiya

Date and Place of review: the United Kingdom on 14thNovember, 2020

Rating: 5/5

Feedback:  I am a buy to let landlord and have installed 3 Biasi boilers so far and all 3 boilers have been working superbly without any issue. Prices and Quality wise I guess my choice is good up to now.

III. Worcester Bosch Greenstar Danesmoor  regular boilers

Top review:

Reviewer: MR. I Shaikh

Date and Place of review: the United Kingdom on 14thNovember, 2020

Rating: 5/5

 Feedback:  We are very impressed with the boiler

We are very impressed with the boiler, it is very powerful and quiet, and it’s also very energy-efficient and hopefully will save us money and the environment too.

 IV. Vaillant ecoTEC Plus Combi Boilers

Top review:

Reviewer: Paul

Date and Place of review: the United Kingdom on 14thNovember, 2020

Rating: 5/5


The boiler was installed and they were very efficient at arranging the replacement. The boiler is a vast improvement over the one it replaced, which was at least 20 years old. The heating in the house is finally quick, hot, and controllable. For a long time, I thought the problem was with the radiators and I’d need to replace them, but it was the boiler and the Vaillant boiler has been a game-changer.


  1. How Often Should I Replace My Boiler?

The general lifespan of a boiler is around 10 to 15 years. While this is an average, your boiler may last longer if you take care of it well.

You should decide to replace your boiler when repairs become too expensive or start mounting up. Opting for a new boiler at this point should save you money in the long run.

An expert engineer should be able to help you decide on the right time to replace your boiler.

  1.  How Do I Know if My Boiler Needs Repairing or Replacing?

If you have a boiler fault it’s most likely a common problem with a simple fix. However it can be difficult to understand whether your boiler can be repaired or not when a more serious issue occurs.

  1. How Often Should I Get My Boiler Serviced?

Getting your boiler serviced when there doesn’t appear to be any issue may seem unnecessary, but servicing your boiler once a year should help to prolong its lifespan.

Having an annual service should help you avoid unforeseen problems with your boiler, and keep it running efficiently.

  1. How Do I Know if My Boiler Is Economical?

If you’re buying a new boiler, or just trying to decide if you need one, how efficient it is will be a big part of your decision.

To find boilers that are economical, look for their ENERGY STAR rating. A well rated boiler should run very efficiently, whereas a poorly rated model may be more cost effective to replace in the long run.

You should find that all modern boilers are more economical when compared to older models.

  5.  How do I know if I’m getting a Good Deal on My Boiler?

Navigating price can be one of the most difficult parts of buying a boiler, and you want to make sure you get the best deal possible.


All of the names listed above are well-known for manufacturing high-quality boilers that are consistently reliable. This isn’t to say that every single boiler these brands have ever built hasn’t run into a problem as this would be impossible to achieve. Nevertheless, these manufacturers and their boiler models are popular among consumers and heating engineers because they score high in terms of build quality and reliability. No matter which boiler you are looking at purchasing, just make sure you do some research to find out what others are saying about the brand and model that might be of interest to you.Out of all the boilers suggested, our survey suggests Vaillant ecoTEC Plus Combi Boilers are the perfect boilers for your homes.

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