Viessmann Boiler Prices Re February 6, 2023

Viessmann Boiler Prices

Viessmann boiler

Do you need some Viessmann boiler prices?

When purchasing a new or replacement boiler, it is important to consider all aspects such as efficiency, reliability and boiler price to ensure that you choose the right one for you and your home. 

This blog will hopefully be the ultimate boiler price guide for all Viessmann boiler prices on the market. Just in case you wanted to learn more about Viessmann boilers, we’ve also got a blog on Worcester Bosch vs. Viessmann boilers, and a blog on Viessmann’s latest addition to the family, the new Vitodens 100-W range. 

It is important to remember that boiler prices and installation can vary depending on the model and the kW output you choose. Other factors may affect the cost, such as your current central heating system, installation costs and additional extras. Keep reading to see what kW boiler output you need for your home

Viessmann UK has 4.5 stars out of 5 on Trustpilot, with over 2.5k reviews, so right off the bat, we can see that customers are very happy with Viessmann boilers. 

The Which?’s 2021 annual boiler brand reliability and customer satisfaction survey asked over 7,500 boiler owners how satisfied they were with their boiler, if they experienced any faults or breakdowns and if they would recommend Viessmann boilers to their friends and family.

Viessmann boilers scored an overall brand score of 81% and a massive 5 out of 5 stars for their customer score, revealing that Viessmann boilers are loved by their customers. 

However, in addition to this, Which? also, asked 153 Which? Trusted Traders about the ease of installation and if parts and spares were easy to get hold of. Traders have scored Viessmann a 3 out of 5 stars for the availability of spares and parts. This is important to remember when considering boiler price as parts may be more expensive due to being harder to get hold of. This is one of the factors that can affect boiler prices. 

Which? Best Boiler brand 2021 survey results:

Overall Score 81%
Reliability5 stars
Customer Score 5 stars 
Engineer Recommendation4 stars 
Build Quality 4 stars
Availability of Spares and Parts 4 stars
Ease of Fixing a Common Fault4 stars 
Ease of Servicing 4 stars

Here’s what Which? Has to say about Viessmann boilers. 

“With a high proportion of satisfied owners and being well-liked by heating engineers, Veissmann boilers are a great Best Buy. These boilers are reliable, and a number of heating engineers in our survey mentioned good build quality. The only minor drawback is that sourcing replacement parts can be a little slow.”

The History behind The Viessmann Group

The Viessmann Group is a German manufacturer of heating, industrial, and refrigeration systems headquartered in Allendorf, Germany.

Viessmann’s roots go back even further than Worcester’s, starting in 1928, where Johann Viessmann was asked by a local gardener to build a boiler for his greenhouse. Johann, then a locksmith, thought ‘why not’ (they didn’t have Playstations back then).

Viessmann innovated on the iron boilers around at the time and built his using steel which heated up faster and used less fuel. Nice work Johann! Soon, all the gardeners in the village wanted one, and Johann got his model patented and set to work. As you can see from the image below, Johann was all about the work…

Since January 2018, the company is led by Martin Viessmann (Chairman of the Executive Board), Maximilian Viessmann (Co-CEO and part-time Bond villain), and Joachim Janssen (Co-CEO). Making Viessmann a family-owned business for four generations, quite a rare thing.

Do different kW outputs affect boiler prices?

The question a lot of us have is, will a higher kW boiler ever cost more to run? You’ll be relieved to know that it doesn’t. 

This is because all modern boilers are fully modulating, so kW output affecting the boiler price is no longer an issue. This used to be an issue that happened in older boilers because they used to cut on and off on a cycle, wasting gas. These days, modern boilers fire up on a high flame and once the radiators or water reaches optimum temperature, the size of the flame will reduce, this is called modulating. They then stay at a simmering level so that they don’t waste gas. This helps to keep the running costs at a minimum. 

Boilers with a higher output could actually be seen as a more efficient choice, as they have the ability to heat your home at a faster rate, but then go into simmer mode, whereas a smaller boiler takes longer to get your radiators to the temperature required.  Your Gas Safe heating engineer should be able to work out the correct output you need for your home, but don’t worry, we’ve included a table just below for you. 

We have attached a combi and system kW size guide below to give you a little more guidance on what size boiler you would need for your home.

Combi Boiler kW Size Guide

No of bedrooms and bathroomsPoorly insulated propertyModerately insulated propertyWell insulated property
1 bed + 1 bath20kW20kW18kW
2 bed + 1 bath20kW20kW18kW
2 bed + 2 bath24kW20kW20kW
3 bed + 1 bath28kW26kW24kW
3 bed + 2 bath28kW28kW24kW
4 bed + 1 bath30kW30kW28kW
4 bed + 2 bath32kW32kW30kW
5 bed + 2 bath40kW35kW30kW

System Boiler kW Size Guide

No of bedrooms and bathroomsPoorly insulated propertyModerately insulated propertyWell insulated property
1 bed8kW7kW5kW
2 bed8kW7kW6kW
3 bed10kW9kW6kW
4 bed12kW10kW7kW
5 bed15kW12kW9kW
6+ bed18kW15kW12kW

Viessmann Combi Boiler Prices

Viessmann 050

A combi boiler not only provides heated water for your central heating system but also gives hot water on demand.

As mentioned at the beginning of this blog, there are some considerations to make when looking at new combi boiler prices, such as:

  • The size of your property
  • Installation costs
  • Additional variable fitting costs and extras
  • How much hot water you use

According to the Viessmann website, the cost of replacing an existing boiler could be estimated at around £600. To install a Viessmann combi boiler in a new location, you’re looking at increasing the boiler price by another £1,100.

Viessmann also offers additional extras such as a power flush, thermostats, chemical flushes and radiators that will increase the boiler price by between £100 and £500 depending on what you add*.

This is probably a great time to mention that all WarmZilla boiler prices include Gas-Safe installation as standard. It also includes a system filter, a system cleanse, guarantee, smart thermostat, and any other bits and bobs you need to get your boiler up and running. 

When purchasing a new or replacement boiler, it is important to consider all aspects, including whether or not installation is included in the price. Not all prices include boiler installation, make sure your quote does as you’ll be looking at £500 – £1,500 to get a boiler installed.

Now you know that all of this is included when purchasing with WarmZilla, you may as well save yourself time and find a new boiler the WarmZilla way – where your price is fixed, everything is included and our online survey will work out exactly what boiler you need based on your answers to some simple questions.


The pros and cons of a combi boiler

The pros of a combi boiler

  • Perfect for compact homes with limited space
  • Remove the need for a storage tank and extensive pipework
  • Cost-effective and easy to install as well as repair
  • Provides a constant supply of hot water on demand 
  • Energy-efficient since it heats water only when needed

The cons of a combi boiler

  • If you live in an area with poor water pressure, then your water flow may be sub-standard, this is not ideal for a combi boiler as they rely on your mains water pressure
  • You can’t use power showers with combi boilers as they rely on hot and cold water feed from gravity-fed systems
  • If your home has more than 2 bathrooms that are usually both used at the same time, a combi boiler may not be able to cope with such high demand for instant hot water
  • Unlike system and regular boilers, there is no hot water tank for backup, meaning if you’re boiler breaks down you will be without hot water.
  • Only particular combi boiler models are compatible with solar energy

Viessmann Combi Gas Boiler Price Comparison Table 

ModelkW Outputs (DHW)kW Outputs (CH)Viessmann Combi Boiler Price**
Vitodens 100-W 19kW 27.3kW19kW

£1,925 – £2,425

Vitodens 100-W 25kW 

31.7 kW

25 kW

£1,895 – £2,395
Vitodens 100-W 32kW 34.9 kW32kW£1,975 – £2,475
Vitodens 200-W 30kW

30.5 kW

25.4 kW

£2,350 – £2,850
Vitodens 200-W 35kW

34 kW

32kW£2,400 – £2,900
Vitodens 050-W 29kW

29 kW


£1,600 – £2,100
Vitodens 050-W 35kW

35 kW

33kW£1,690 – £2,190
Vitodens 111-W 26kW Storage

29.6 kW


£2,476 – £2,976

Vitodens 111-W 35kW Storage 34 kW35 kW£2,500 – £3,000
Vitodens 222-F 19kW Storage21.8 kW19 kW

£3,360 – £3,860

Vitodens 222-F 25kW Storage28.3 kW25 kW

£3,500 – £4,000

Vitodens 222-F 35kW Storage

33.5 kW

32 kW

£3,775 – £4,275

Viessmann System Boiler Prices

System boilers are a hybrid between a combi boiler and a conventional boiler. The system boiler operates like a regular boiler in that it heats and stores hot water in a cylinder but without a cold tank in the loft, saving you space in your home as well as reducing the boiler price when compared to a regular boiler. 

System boilers are in effect, the modern replacement for regular boilers; where you get to keep your hot water cylinder and therefore have greater hot water comfort and higher flow rates for baths and showers.

As stated on the Viessmann website, if you already have a boiler fitted then your boiler replacement should cost between £1,600 and £3,000. This can increase the overall boiler price by quite a bit.

The pros and cons of a system boiler

The pros of a system boiler 

  • Easy installation as components are built-in
  • No storage cold water tank is needed, hence, space saver
  • Meets high hot water demands without sacrificing water pressure
  • Energy saver as well as compatible with green renewable sources of energy like solar thermal power

The cons of a system boiler

  • An additional large hot water storage tank is required, not suitable for flats or smaller homes
  • Loss of heat from the hot water storage tank, no matter how well insulated
  • Hot water is limited to the capacity of the storage tank, once the hot water from the tank is used up you will have to wait for it to heat the water again, unlike the combi boiler which heats water straight from the mains so it will always be hot

Viessmann System Gas Boiler Price Comparison Table 

ModelkW Outputs (DHW)kW Outputs (CH)Viessmann System Boiler Price**
Vitodens 200-W 11kW N/A11kW

£2,144 – £2,644

Vitodens 200-W 19kW N/A19kW£2,300 – £2,800
Vitodens 200-W 25kW N/A25kW

£2,350 – £2,850

Vitodens 200-W 32kW N/A32kW£2,450 – £2,950
Vitodens 100-W 11kW N/A19kW

£1,795 – £2,295

Vitodens 100-W 19kW N/A26kW

£1,795 – £2,295

Vitodens 100-W 25kWN/A30kW

£1,900 – £2,400

Vitodens 100-W 32kW N/A35kW

£1,975 – £2,475

If you’re looking to buy a new boiler then get a boiler quote from WarmZilla. It only takes two minutes, you don’t need to have any technical knowledge, and it’s all done online. Easy!

Viessmann Regular Boiler Prices

Regular boiler systems, also known as conventional, traditional, heat-only, or open vent boilers, are the most difficult to install or replace. A regular boiler includes both a hot and cold water storage tank, the boiler itself, and an expansion cistern located next to the cold water tank. This takes up quite a bit of space in a home and it’s usually preferable to switch to a combi so that these tanks can be removed.

Most likely, you would only tend to keep a regular boiler system if you were concerned that your central heating system would struggle to cope with the increased water pressure from a system or combi boiler.

Similar to system boilers, regular boilers can supply large amounts of hot water simultaneously to multiple bathrooms due to the hot water storage tank facility. Typically, if you already have a regular boiler fitted, the price for replacement should cost between £1,500 and £2,500.

If you are replacing your combi boiler or have no boiler fitted, the boiler price will increase significantly. This is because you’ll require a hot water cylinder and cold-water storage tank fitted in your loft. As a rule of thumb, you should expect to pay £2,200 – £3,400 to replace a combi boiler and £2,500 – £3,700 for a new install.

The pros and cons of a regular boiler

The benefits of a regular boiler

  • Allows use of hot water in multiple bathrooms simultaneously
  • Doesn’t compromise on the water pressure
  • Ideal for older properties looking to install a new boiler as they already have a similar pipe system in place
  • Compatible with solar panels as well as heat pump based heating systems

The cons of a regular boiler

  • The amount of space the boiler and tanks take up is impractical, particularly for smaller homes or flats
  • Limited hot water up to the volume of your hot water storage tank
  • Hot water tank loses heat, no matter how well insulated
  • Difficult to install, only suitable as a replacement for another regular boiler system

Viessmann Regular Gas Boiler Price Comparison Table

ModelkW Outputs (DHW)kW Outputs (CH)Viessmann Regular Boiler Price**
Vitodens 100-W Compact 13kW N/A13kW

£1,645 – £2,145

Vitodens 100-W Compact 16kWN/A16kW

£1,700 – £2,200

Vitodens 100-W Compact 19kWN/A19kW

£1,700 – £2,200

Vitodens 100-W Compact 26kWN/A26kW

£1,700 – £2,200

Vitodens 100-W Compact 35kWN/A35kW£2,000 – £2,500

If you are unsure about whether or not you require a new or replacement boiler, we have a blog that explains the signs your boiler may give you when it’s time to hang up its coat. For more information on whether or not you should replace your boiler, click here.

Viessmann Boiler Fault Codes

As you can see from the Which? Best Boiler Brand 2021 survey, Viessmann boilers are reliable and efficient. However, with time, your boiler may get tired and worn out from keeping your home warm. If you come across an issue with your Viessmann boiler, we have covered the standard Viessmann Boiler Error Codes/ Fault Codes in a blog to help you identify the problem and report it to your local heating engineer. 

*These prices were taken from an online price comparison site. The prices shown are the estimated total cost, including installation and VAT. T&C pages.

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