Vitodens 100-W gas condensing boiler
Vitodens 100-W

Our best selling gas condensing boiler

Efficient, compact, quiet and affordable, the Vitodens 100-W gas condensing boiler is the most popular solution for smaller and well insulated homes. Featuring innovative technology and services combined with reliability and longevity and comes ready for smart technology, helping you to optimise your heating and save on energy costs. Made in Germany, the Vitodens 100-W boiler is built with reliability in mind; from the stainless steel heat exchanger to the extended modulation ratio which reduces component stress. Our best selling boiler is made to last. Vitodens 100-W 30 kW Combi reviewed as a Which? Best Buy.

  • EfficiencyLabel
  • EfficiencyLabel
  • Up to 10 years


  • Easy control LCD


  • Smart Home

     with tado°

  • Boiler Plus


  • Quiet


  • Endorsed by


  • Energy Efficiency


  • Made in


  • Compact design and low weight
  • Quiet operation thanks to low fan speed
  • Available in outputs from 4.7 to 35 kW
  • High quality stainless steel Inox-Radial heat exchanger
  • High efficiency - SEDBUK 2009 seasonal efficiency: 89.5%
  • Class A rated for energy efficiency
  • Low CO2 emissions for reduced environmental impact
  • User friendly Backlit LCD Touch screen for easy operation
  • Optional room thermostats available
  • Up to 10 year extended warranty available

Key benefits

Smart control with tado°

With our optional easy-to-install tado° thermostat and smartphone app, you can optimise your heating environment and save energy costs from the palm of your hand - no matter where you happen to be.

Touchscreen display

The Vitodens 100-W wall mounted gas condensing boilers are controlled by the new, backlit LCD touchscreen, making it easy to read and use in dark environments. An option for wireless remote control is also available.

Up to 10 years guarantee

The Vitodens 100-W comes with a 5 year comprehensive warranty as standard, with an extended warranty option of up to 10 years available if fitted by a Viessmann Trained Installer.

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Related products

Vitodens 050-W gas condensing boiler
Vitodens 050-W

A compact, low-cost gas condensing boiler

With compact dimensions, low weight and quiet operation, the attractively priced Vitodens 050-W is a low-cost gas condensing boiler that does not compromise on quality. Which? Best Buy, Vitodens 050-W 29 kW Combi.

Discover more
  • Up to 7 years


  • Easy control with

    LCD Display

  • Smart Home

     with tado°

  • Boiler Plus


Discover more
  • EfficiencyLabel
  • EfficiencyLabel

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