Viessmann

About Viessmann

The Viessmann Group is a leading German manufacturer of domestic, commercial, and industrial climate solutions. Headquartered in Allendorf, Germany, the company was founded in 1917 and is a fourth-generation family company. 

Viessmann entered the UK market in 1989 and has its UK headquarters and distribution centre in Telford, Shropshire.

In the UK, Viessmann’s product range includes gas boilers, oil boilers, air and ground source heat pumps, steam boilers, biomass boilers and combined heat and power generation. 

Globally, Viessmann operates in 74 countries around the world and has over 12,000 employees. In the UK, the company trains approximately 2,500 installers, contractors, specifiers, and architects on its products at its UK-based Viessmann Academies each year.

With a market share that continues to grow in the UK, Viessmann is gaining increasing brand recognition, thanks in part to the entire Vitodens range being awarded Which? Best Buy status every year since 2017.

Renowned for its use of innovative technology, Viessmann develops all of its products with sustainability in mind. This results in Viessmann offering some of the most energy-efficient boilers available in the UK and systems which are compatible with sustainable energy sources including solar, wood combustion, and heat pumps.

All of the boiler systems available in the UK and the components utilised within these are manufactured and assembled in Viessmann’s Allendorf production facility.

Viessmann is known for the reliability, durability, and energy efficiency of its boilers.

Viessmann

Viessmann Boiler Range

Viessmann offers a comprehensive range of combi boilers, storage combi boilers, system boilers and conventional boilers for domestic use. Viessmann’s domestic boiler range is available in gas and oil fuel types.

The Viessmann gas combi boiler range comprises the Vitodens 050-W, Vitodens 100-W, and the Vitodens 200-W. The gas storage combi boiler range comprises the Vitodens 111-W and the Vitodens 222-F. The Vitodens 100-W and 200-W are also available as system boilers, and the Viessmann gas conventional boiler range comprises the Vitodens 100-W Open Vent and the 200-W Open Vent. 

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Viessmann Vitodens 100-W Open Vent

Viessmann Vitodens 100-w Open Vent

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Frequently asked questions about Viessmann

We are often asked by customers just how good Viessmann boilers are, our answer to this is that they are excellent.

Viessmann offers the most technologically advanced and efficient boilers currently available on the UK market. Our opinion of Viessmann boilers is based on the technology employed across the range, the efficiency of its boilers, the flow rates offered by Viessmann combi boilers, and the company’s usage of components that are all manufactured in-house at its Allendorf production facility.

Key to the excellent quality of Viessmann boilers is the usage of its patented Inox-Radial stainless steel heat exchanger. Constructed from the highest grade of stainless steel, Viessmann’s heat exchangers are highly resistant to corrosion, don’t require special fluids as aluminium heat exchangers do, and are designed to retain the boiler’s efficiency for the lifetime of the appliance.

Our opinion of Viessmann is backed up by Which?, with the consumer organisation awarding the Vitodens domestic boiler range Which? Best Buy status every year since 2017. To determine Best Buy status, Which? surveys over 8,458 consumers about the boiler brand they own and whether they would recommend it to a friend. Which? also surveys over 170 registered Trusted Traders heating engineers on their thoughts about the boiler brands they work with and their thoughts about installation, services, fault fixing, and the availability of parts and spares.

Upon being awarded Best Buy status for the first time in 2017, Which? said the following about Viessmann, “Viessmann has been on the cusp of being a Best Buy boiler brand for the past few years, and 2017 sees it deservedly crack it. Its reliability score is the best of any brand” and “Two-thirds of owners would definitely recommend their Viessmann boiler to a friend. Engineers are positive about Viessmann too.”

Viessmann has now been awarded Which? Best Buy status multiple times and was described as a “very smart choice” by the consumer organisation in its latest survey.

Both our opinion and the opinion of Which? is reflected by Viessmann UK being rated excellent by Trustpilot, with a TrustScore of 4.6 on the review platform.

Viessmann has 22 production facilities in 12 countries across the world. However, all of the Viessmann boilers available in the UK are manufactured at Viessmann’s global head offices and production facilities in Allendorf (Eder) in Hesse, Germany.

Yes, Viessmann’s UK office has been based in Telford, Shropshire since 1989. From this office, Viessmann coordinate the training of approximately 2,500 installers, contractors, specifiers and architects on its products each year across the UK.

Yes, all Viessmann spare parts are stocked at Plumbase and several other plumbing merchant locations around the UK.

Viessmann was established in 1917 in Hof an der Saale, Germany by Johann Viessmann. A family-owned company for four generations, Viessmann is today led by Martin Viessmann, Maximillian Viessmann and Joachim Janssen.

With 23 production facilities, representative offices in 74 countries, and 120 sales offices across the world, Viessmann employs over 12,300 people globally.

No, purchasing a Viessmann boiler is exactly the same as it was prior to Brexit.

The Viessmann boiler that is right for you is dependent on several factors. These include the following:

  • The size of your property
  • The hot water demands of your household
  • Your current boiler system
  • Whether your home is connected to the mains gas network 

To illustrate the most suitable boiler for your needs, we have detailed a number of typical scenarios and the most suitable boiler for these below:

One bedroom flat with one bathroom and an existing combi boiler 
Suggested boiler: Viessmann Vitodens 050-W 29kW
Three bedroom semi-detached house with one bathroom, eight radiators, and an existing combi boiler
Suggested boiler: Viessmann Vitodens 100-W 30kW combi boiler
Three bedroom terrace house with two bathrooms, ten radiators, and an existing combi boiler 
Suggested boiler: Viessmann Vitodens 100-W 32kW combi boiler
Three bedroom semi-detached house with three bathrooms, 12 radiators, and an existing system boiler
Suggested boiler: Viessmann Vitodens 111-W 32kW storage combi boiler
Three bedroom detached house with two bathrooms, 13 radiators and an existing system boiler
Suggested boiler: Viessmann Vitodens 100-W 25kW system boiler
Four bedroom detached house with two bathrooms, 15 radiators and an existing system boiler
Suggested boiler: Viessmann Vitodens 100-W 30kW system boiler

The Viessmann Vitodens 050-W is Viessmann’s entry-level boiler range, whilst the Viessmann Vitodens 100-W is a more advanced boiler range from Viessmann. A comparison of the two boiler range can be found below:

Viessmann Vitodens 050-WViessmann Vitodens 100-W
System boiler sizes:N/A11kW, 19kW, 25kW and 32kW
Combi boiler sizes:29kW and 35kW26kW, 30kW and 32kW
Heat exchanger:Stainless steel Inox-Radial heat exchangerStainless steel Inox-Radial heat exchanger
Energy efficiency: Class A ratedClass A rated
Flow rate:29kW: 12.3 l/min

35kW: 14.5 l/min

26kW: 10 l/min

30kW: 12 l/min

32kW: 14.5 l/min

Modulation range:Up to 1:4Up to 1:10
Efficiency rating:97%94%
Warranty: Up to 10 year extended warrantyUp to 12 year extended warranty
Boiler Plus compatible:YesYes
Country of manufacture:GermanyGermany
Dimensions:707mm (height) x 400mm (width) x 350mm (depth)700mm (Height) x 400mm (Width) x 350mm (Depth)
Boiler controls:Digital user interface with LCD displayBacklit LCD touch screen
Integrated WiFi:NoYes
ViCare compatible:NoYes
Weather compensation compatible:YesYes
LPG compatible:YesYes
Hydrogen

H2 Ready:

NoYes

The Viessmann Vitodens 100-W and the Viessmann Vitodens 200-W are two boiler ranges available from Viessmann. A comparison of the two boiler ranges can be found below:

Viessmann Vitodens 100-WViessmann Vitodens 200-W
System boiler sizes:11kW, 19kW, 25kW and 32kW19kW, 26kW, 30kW, 35kW
Combi boiler sizes:26kW, 30kW and 32kW30kW and 35kW
Heat exchanger:Stainless steel Inox-Radial heat exchangerStainless steel Inox-Radial heat exchanger
Energy efficiency: Class A ratedClass A rated
Flow rate:26kW: 10 l/min

30kW: 12 l/min

32kW: 14.5 l/min

30kW: 12.3 l/min

35kW: 14.3 l/min

Modulation range:Up to 1:10Up to 1:17
Efficiency rating:94%98%
Warranty: Up to 12 year extended warrantyUp to 12 year extended warranty
Boiler Plus compatible:YesYes
ViCare compatible:YesYes
Country of manufacture:GermanyGermany
Dimensions:700mm (Height) x 400mm (Width) x 350mm (Depth)850 mm (Height) x 450mm (Width) x 360mm (Depth)
Boiler controls:Backlit LCD touch screenBacklit 7” colour touch screen
Integrated WiFi:YesYes
Weather compensation compatible:YesYes
LPG compatible:YesYes
Hydrogen

H2 Ready:

YesYes

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