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Last updated: 6 November 2023

50kW Boilers – Everything You Need to Know

50kW boiler

Finding a 50kW boiler is not an easy task. Although top boiler brands in the UK manufacture them, there are not too many models to choose from. The main reason is that a 50kW domestic boiler is best suited for a large house with multiple bathrooms and 5 bedrooms or more, and —as you may suspect— there are not many properties like this around.

As we mentioned, the 50kW boiler market is smaller than that of less powerful boilers (e.g. 24kW boilers, 35kW boilers). However, in spite of this limitation, there are options that are worth considering. In this article, we will help you find and compare 50kW boilers for your home. 

Our selection below includes 50kW combi boilers, 50kW heat-only boilers, and 50kW system boilers from top boiler brands in the UK.

However, if you already know what type of boiler you’d like for your home and just want to find a reliable installer as soon as possible, then we can help you. Our team at GreenMatch can connect you with up to 3 certified installers available in your area. This way you can save time by letting us do the tedious research for you and you can also easily compare the installers to choose the one with the best offer.

Our service is completely free and you’re under no obligation to accept any of the quotes you receive. Click the button below to get your free boiler quotes now.

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50kW System Boilers

System boilers are effective heating solutions for medium-to-large homes with more than one bathroom. This is because they are capable of running your radiators and providing your taps and showers with high volumes of pressurised hot water. 

Of course, the more powerful they are (output rating), the higher the central heating (CH) and domestic hot water (DHW) demand they meet. A 50kW system boiler is at the most powerful end of the spectrum, so you don’t really need to worry about it not being powerful enough. However, it may become an issue if what you need is a boiler for a small house.

System boilers take water directly from the mains and work alongside a hot water storage cylinder. This external component allows you to use multiple hot water outlets simultaneously. Without the cylinder, the hot water flow may weaken if, for instance, two showers are used at the same time.

Their downside is that, including the cylinder, they will take up considerable space in your home. However, if you are looking for a 50kW domestic boiler, it is probably because you have a large house and enough spare room. Thus, installing a system boiler isn’t really a problem in your case, at least space-wise. 

We have put together some 50kW system boiler models so that you can compare them:

1. Vaillant ecoTEC plus 48kW system gas boiler

Vaillant ecoTEC plus 48kW system gas boiler

Don’t let its maximum central heating output mislead you! For practical matters, the Vaillant ecoTEC plus 48kW system boiler is as effective as any 50kW gas boiler. This system boiler is a suitable solution for larger domestic properties that have greater heating and hot water demands.

Among other features, this condensing boiler boasts high-efficiency ratings that allow lower running costs. It also includes an air separator for quieter running and a wide range of accessories and controls. Additionally, it is LPG compatible, which allows flexibility in homes where mains gas is (temporarily) unavailable.

  • Max. CH output: 48kW
  • Suitable for: Large domestic properties
  • Efficiency: 94% efficiency and ErP A+ rated for heat
  • Warranty: 5 years as standard
  • Estimated price (Exc. installation): The Vaillant ecoTEC plus 48kW boiler price is £2,264. This amount includes VAT.

2. Worcester Bosch GB162 50kW system gas boiler

Worcester Bosch GB162 50kW system gas boiler

The Worcester Bosch GB162 may be the ideal 50kW boiler for larger homes and light commercial settings. This Worcester 50kW gas boiler can be installed on its own or as part of a multi-boiler cascade system, allowing even higher heating demands to be met.

It boasts an easy-to-use control system and includes intelligent features such as weather and load compensation to ensure high efficiency and comfort.

  • Max. CH output: 49.9kW
  • Suitable for: Larger homes and light commercial settings
  • Efficiency: 93% efficiency and ErP A-rated for heat
  • Warranty: 2 years as standard
  • Estimated price (Exc. installation): The Worcester Bosch GB162 50kW boiler price is £2,209 (Incl. VAT), approximately

3. Viessmann Vitorondens 200-T 53kW system oil boiler

Viessmann Vitorondens 200-T 53kW system oil boiler

This is a highly-efficient condensing oil boiler in the 50kW system boiler range suitable for detached houses, two-family houses and apartment buildings. It can also be used in commercial and public buildings. 

It features a self-cleaning stainless steel heat exchanger for the utilisation of condensing technology. Additionally, the dimensions of the Vitorondens 200-T 53kW are fairly compact for a boiler of its size (output rating).

  • Max. CH output: 53.7kW
  • Suitable for: Larger homes with a high demand for heating and hot water
  • Efficiency: 97% efficiency and ErP A-rated for heat
  • Warranty: 7 years
  • Estimated price (Exc. installation): The Viessmann Vitorondens 200-T 53kW boiler price is £7,741 (Incl. VAT)

Are any of these 50kW system boilers the perfect match for your home? Just click on the button, and we will send you up to 3 offers tailored to your requirements from suppliers in your area. You are not obliged to accept any quote you receive.

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50kW Combi Boilers

A combination or combi boiler is a compact, single boiler unit that can heat both your hot water and your central heating. Compared to a system boiler, it is much more space-saving, as it doesn’t require a hot water storage cylinder. Their compactness is, precisely, one of the reasons why combi boilers are the most commonly installed type of boiler in the UK.

Among their many advantages, combi boilers can provide a fast supply of instant hot water. This means that you can use as much hot water as you want without worrying about the maximum capacity of a storage cylinder, as you would do if you were using a system or a conventional boiler.

However, they are best suited for small houses and 3-bed houses , as many of them may struggle to provide hot water simultaneously to multiple water outlets. To meet this demand comfortably, a combi boiler would need to be very powerful, and such a powerful combi unit is rare.

Due to the limited number of models, finding a 50kW combi boiler is hard, especially a 50kW gas combi boiler. Below we have put together our picks for the best combi boiler for a large house (50kW).

1. Worcester Bosch Greenstar 8000 LifeStyle 50kW combi gas boiler

Worcester Bosch Greenstar 8000 LifeStyle 50kW combi gas boiler

These are actually two premium Worcester Bosch 50kW gas boiler models: Life and Style. They share all the main features, but the Style model is available in high gloss black or white, making it the ideal 50kW boiler for interior design. It is also more expensive than the Life version. 

These boilers include wireless connectivity with the Bosch EasyControl. They are also ready to run on a 20% hydrogen blend. Optionally, you can equip them with an Intelligent Filling System. 

  • Max. CH output: 35kW
  • Max. DHW output*: 48.9kW
  • Suitable for: Properties with up to 20 radiators and 2 bathrooms
  • Efficiency: 94% efficiency and ErP A-rated for heat and hot water
  • Warranty: 5-year warranty as standard. It can be extended to 12 years when installed by a Worcester Bosch accredited installer
  • Estimated price (Exc. installation): The Greenstar 8000 Life 50kW boiler price is £2,100, while the Greenstar 8000 Style 50kW can cost you approximately £2,297. Both amounts include VAT.

2. Mistral Outdoor Mega Combi Plus CODMC5 50kW oil boiler

Mistral Outdoor Mega Combi Plus CODMC5 50kW oil boiler

This is a floor-standing condensing oil boiler in the 50kW combi boiler range suitable for large properties. The unit is fitted with a 230V electric immersion heater as a backup in case of breakdown. It also features a 7 day programmer allowing 2 individual daily time zones to be selected.

  • Max. CH output: 50kW
  • Max. DHW output*: Not available
  • Suitable for: Large properties
  • Efficiency: 90% efficiency and ErP A-rated for heat and hot water
  • Warranty: 2-year warranty on parts and a 5-year warranty on the heat exchanger
  • Estimated price (Exc. installation): This Mistral 50kW boiler price is £3,960 (Incl. VAT)

3. Mistral Outdoor Mega Combi Standard CODMC5 50kW oil boiler

Mistral Outdoor Mega Combi Standard CODMC5 50kW oil boiler

The Mistral Outdoor Mega Combi Standard CODMC5 50kW oil boiler is a very powerful unit suitable for large properties. It is quite similar to the Plus version described above. The main differences between them are the extra features and functions the Plus model includes (the immersion heater and the 7 day programmer) and the price.

  • Max. CH output: 50kW
  • Max. DHW output*: Not available
  • Suitable for: Large properties
  • Efficiency: 90% efficiency, ErP A-rated for heat and ErP B-rated hot water
  • Warranty: 2-year warranty on parts and a 5-year warranty on the heat exchanger
  • Estimated price (Exc. installation): This Mistral 50kW boiler price is £3,540 (Incl. VAT)

* Combi boilers have two output ratings: one for central heating (CH) and another for domestic hot water (DHW).

If you’re interested in purchasing a 50kW combi boiler, and you would like to compare different installers, then GreenMatch is here to help. Just click the button below, and we will send you up to 3 offers tailored to your requirements from suppliers in your area. You are not obliged to accept any quote you receive.

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50kW Heat-Only Boilers

A conventional boiler —also known as a regular boiler or a heat-only boiler— is a traditional heating system suitable mainly for large houses. They are among the oldest types of boilers around; however, it doesn’t mean they are outdated models. Most boiler brands keep manufacturing highly efficient regular boilers compatible with modern technologies.

Conventional boilers produce hot water for central heating, but not for your taps or showers (this is where the name “heat-only” comes from). To provide hot water for domestic use, a regular boiler needs a large feed water tank in the loft and a hot water storage cylinder.

A 50kW heat-only boiler will take considerable space around your home; however, you can rest assured that your home’s heating and hot water demands will be covered at all times. We have listed a few models below:

1. Worcester Bosch Greenstar 8000 Life 50kW regular gas boiler

Worcester Bosch Greenstar 8000 Life 50kW regular gas boiler

As with all other models in the Greenstar 8000 range, this Worcester Bosch 50kW gas boiler is ready to run on a 20% hydrogen blend, making it a future-proof heating unit. It also includes wireless connectivity with the Bosch EasyControl.

  • Max. CH output: 50kW
  • Suitable for: Larger homes with over 20 radiators and high demand for heating
  • Efficiency: 94% efficiency and ErP A-rated for heat
  • Warranty: 5-year warranty as standard. It can be extended to 12 years when installed by a Worcester Bosch Accredited Installer
  • Estimated price (Exc. installation): This Greenstar 8000 Life 50kW boiler price is £2,300 (Incl. VAT)

2. Keston Heat 55kW regular gas boiler

Keston Heat 55kW regular gas boiler

This model in the Keston 50kW boiler range comes with an inbuilt weather compensator and an inbuilt pump to help with low energy modulating. It can be installed as part of a boiler cascade system producing up to 330kW (6 boilers).

  • Max. CH output: 55kW
  • Suitable for: Large homes or light commercial settings
  • Efficiency: 89.6% efficiency and ErP A-rated for heat
  • Warranty: 5-year warranty
  • Estimated price (Exc. installation): This boiler will likely cost you around £2,610 (Incl. VAT)

3. Worcester Bosch Greenstar Utility 32/50 regular oil boiler

Worcester Bosch Greenstar Utility 32/50 regular oil boiler

Among other special features, this 50kW heat-only boiler can be used with Bosch’s Greenskies solar pv panels for energy and cost savings. In addition, the concealed controls on the unit make it suitable for properties with young children.

  • Max. CH output: 50kW
  • Suitable for: Larger homes with 20+ radiators and 3+ bathrooms or small commercial buildings
  • Efficiency: 90% efficiency and ErP A-rated for heat
  • Warranty: 2-year warranty as standard. It can be extended to 5 years
  • Estimated price (Exc. installation): This Worcester Bosch 50kW boiler price is £2,211 (Incl. VAT)

As you can see, there are some excellent 50kW boiler models to choose from. When selecting the most suitable one for your house, we strongly recommend contacting certified local installers and comparing their quotes to get accurate indications and also the best value for your money. If you only contact one installer and go for the first quote you receive, you’ll likely be overpaying for your boiler installation.

However, finding multiple installers who are also available in your area can be challenging. This is where GreenMatch comes in. We have a large network of vetted boiler installers across the UK. We can easily connect you with up to 3 qualified installers whose quotes you can compare to ensure you’re getting the best deal possible.

Click the button below to get your free, non-binding quotes now and have your new 50kW boiler installed in no time.

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FAQ

Luis Antonio Gómez Pérez

Luis Antonio is a seasoned Content Writer with international journalism experience. His writing style, enriched by a Master’s in Journalism, contributes informative content to GreenMatch on topics including low-carbon heating systems.

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