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. 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

Tado, remote, smart heating.

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.

Touchscreen display of a Vitodens 100-W gas condensing boiler
An engineer repairing some plumbing piping.

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.

Compact dimensions

With its compact dimensions, low weight and quiet operation, the attractively priced Vitodens 100-W gas condensing boiler will integrate effortlessly into any living space.

A high output ratio makes it a particularly suitable boiler option for use in small apartments and well insulated buildings.

Reliable and durable - Made in Germany

As a major manufacturer, with many years of experience in the manufacture of wall mounted boilers we know what matters. Even when attractively priced, our standards of product quality and performance are consistently implemented. Therefore Viessmann wall hung boilers are not only renowned for innovative technology and services, but particularly for reliability and longevity.

Multiple use of a chimney

The Vitodens 100-W gas condensing boiler also makes for an ideal replacement for older boiler systems in property modernisation and renovation projects. Using a Viessmann combined flue system (CFS) means numerous boiler flues can be routed up the riser to one roof termination point. The Vitodens 100-W boilers have combined PRV and condensate connections that can also be routed in to the CFS, and one single drain at the base of the system is all that is needed to remove the condensate, without unsightly pipes protruding through the external walls.

Not sure which gas boiler you need? Use our simple tool.

Product Data


tado° - Intelligent Heating Control

With the easy-to-install tado° thermostat and smartphone app, you can optimise your heating environment and save energy costs.


ViCare app

With the new ViCare app, operating your heating system has become even easier and more intuitive.


Vitotrol app

With the Vitotrol app and a smartphone, controlling Viessmann heating systems couldn't be easier.

Brochure | Domestic Gas Boiler Guide

Weather compensation


Vitodens 100-W

Vitodens 100-W

Vitodens 100W

Output (kW)

Vitodens 100-W

7.9 to 35 kW

Output (kW)

Vitodens 100-W

7.9 to 35 kW

Standard seasonal efficiency [SEDBUK 2009/2012]

Vitodens 100-W

97 % (Hs) [gross cv] / 108 % (Hi) [net cv]


Vitodens 100-W

Natural Gas & LPG

Application range

Vitodens 100-W

Residential buildings, commercial enterprises, local authority premises, new builds and modernisation projects


Vitodens 100-W

Easy to use dials with a large LCD display

Heat Only boiler

Vitodens 100-W

With 5 outputs 13, 16, 19, 26 & 35 kW

Additional features

Vitodens 100-W

MatriX cylinder burner and Inox-Radial heat exchanger

Energy efficiency class

Vitodens 100-W


Application range

Vitodens 100-W

Detached and two-family house, apartment buildings, new build and modernisation projects

Our customers think we're great!

Like what you see? Get a quote from a local installer.

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 the Vitodens 050-W
  • Up to 7 years
  • Easy control with
    LCD Display
  • Smart Home
     with tado°
  • Boiler Plus
Discover the Vitodens 050-W
  • EfficiencyLabel
  • EfficiencyLabel
Trending Topics
Latest Topics