Helping UK homeowners make the right heating choices

Viessmann Boilers – Prices, Guarantees & Ranges


viessmann logoViessmann is a German company established by the Viessmann family over 100 years ago. The brand prides itself on innovation and technological development. A global manufacturer, they offer a wide range of both commercial and domestic boilers alongside cooling solutions, heat pumps, solar thermal and ventilation systems.

Viessmann Product Range

  • Combi, System and Regular Boilers
  • High Output Oil Condensing Boilers
  • Combined heat and power systems; world’s first fuel cell heating appliance
  • Heat pumps and ice stores
  • Hybrid appliances
  • Wood heating systems (pellets, woodchips, logs)
  • Solar thermal and photovoltaic systems
  • Cylinders, system design and accessories

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Popular Combi Boilers

Combi boilers do not require a hot water cylinder and header tank as they take their water supply directly from the mains and produce hot water on demand for both your radiators and taps.

Vitodens 200 CombiVitodens 100 CombiVitodens 050-W Combi
Available Outputs (kW)26, 30, 3526, 30, 3529, 35
ErP RatingAAA
Standard Warranty5 years parts & labour5 years parts & labour, 10 years on heat exchanger93 years parts & labour
Modulation Ratio1:20 (35kW)1:61:4

Popular System Boilers

A Viessmann System boiler with an unvented hot water cylinder will produce hot water for your central heating and for your taps. The Vitodens 100 and 200 models are available in several different outputs for small, medium and large homes.

Vitodens 200 SystemVitodens 100 System
Available Outputs (kW)19, 26, 30, 3519, 26, 30, 35
ErP Efficiency RatingAA
Standard Warranty5 years parts & labour, 10 years on heat exchanger5 years parts & labour, 10 years on heat exchanger
Modulation Ratio1:20 (35kW)1:6

Take a look at the energy efficiency rating of Viessmann boilers here.

Popular Regular Boilers

Viessmann Regular boilers are ideal if you’re looking to replace the boiler in an older, traditional heating system i.e. a system which includes a feed and expansion tank in the loft and a hot water storage cylinder.

Vitodens 100-W Open vent
Available Outputs (kW)13, 16, 19, 26, 35
Efficiency LevelsUp to 97%
LPG Convertible?Yes
Standard Warranty5 years parts & labour, 10 years on heat exchanger
Modulation Ratio1:3

Popular Discontinued Boilers

Below you can find more information about some of Viessmann’s most popular discontinued models (ideal if you want to compare your current boiler to their new offerings).

Viessmann Boiler Prices

In general Viessmann boilers cost in the region of £800 – £1,500 but some of the larger output models can reach up to £3,500. The exact cost of your new boiler will depend which model and size you choose.

The cost of installation will also vary from supplier to supplier so be sure to source more than one quote so you’re able to compare and identify potential savings.

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Viessmann Guarantee

Viessmann boilers include a standard guarantee of at least 2 years but in most cases it is 5 years with 10 years on the heat exchanger. If your boiler installed by a Viessmann Trained Installer, you also have the option to extend the standard parts and labour warranty up to 7 or even 10 years.

Why Choose Viessmann Boilers?

Viessmann boilers are built with technology developed over a century of research and expertise. For example, some boilers can achieve efficiency of up to 97% because of the corrosion-resistant stainless steel Inox-Radial heat exchanger. Their range includes a wide variety of sizes for all types of home and include generous warranties which back up their confidence in their products.

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