Viessmann Vitodens 100-W 26kW Combi Boiler B1KF

More About The Viessmann Vitodens 100-W 26kW B1KF

Equipped with Viessmann’s patented Inox-Radial stainless steel heat exchanger

Unlike many other boiler manufacturers, Viessmann utilises a stainless steel heat exchanger in their boilers rather than aluminium. The Vitodens heat exchanger is patented and offers the following benefits:

• Increased efficiency, reliability, durability and corrosion resistance compared to aluminium
• The technology is a major contributor to the 94% efficiency rating
  

  Viessmann’s radial stainless steel heat exchanger.

12-year comprehensive warranty

The reliability of this boiler is backed up by the up to 12-year comprehensive warranty. The mechanical design of the Vitodens 100-W has reduced the number of spare parts needed for routine maintenance by about 50%. This means routine maintenance and servicing is made easier.

Easy operation

Operating the 100-W 26kW is simple thanks to the new LED touchscreen display and ViCare app.

The latest model is compatible with Tado, Hive and Nest smart thermostats. But we wouldn’t recommend Hive for Viessmann boilers as it is not Open Therm compliant. So pairing a Hive and 100-W wouldn’t allow you to take full advantage of modulation.

Touchscreen on the Vitodens 100-W range.

Viessmann have their own smart thermostat too. The ViCare+ Climate Sensor thermostat and app are great products. We recommend the ViCare+ system because it will follow the boiler’s 12-year warranty. Like other smart thermostats, it allows daily routines, boosting, and temperature control away from home. It’s available for Android and iOS.

Viessmann control app

Although we can install Nest systems, their customer service isn’t great. So if the unit breaks you could be left without heating.

Weather compensation

To increase its efficiency, the 100-W is compatible with weather compensation. When set up right, this allows the boiler to adjust heat output based on the outside temperature. So, when the temperature drops outside, the boiler can turn on- earlier than an internal thermostat would. And it would modulate to its lowest power to keep a nice temperature in the home. This can help save up to 15% on your fuel bills!

Smart thermostats are not required, though. Boilerhut includes an EPH Combipack 4 with installation.

Combined Condensate & PRV

Viessmann’s entire boiler range also has combined PRV (pressure relief valve) and condensate connections. This means one single drain at the base of the system is all that is required to remove the condensate.

For more details on condensate and condensate pipes, please read our guide >

Built-in shock arrestor

The Vitodens 100-W 26kW combi boiler has a built-in shock arrestor. This stops the loud rattling and banging of water pipes when a tap or shower turns on or off.

Boiler reset

Like all modern devices, sometimes a boiler needs to be reset. The 100-W 26kW is very easy to rest. The Boilerhut engineer will show you how to do this once the installation is complete. Press the up and down temperature arrows for approximately four seconds. A rotating bar will appear on the display. This indicates that the restart process has started.

All components manufactured in-house

All components used within this boiler are made in Allendorf, Germany. This is Viessmann’s main Vitodens facility. This in-house production is key in keeping their premium product at a lower price.

Wide availability of parts

When Viessmann first entered the UK market, parts were hard to find. Viessmann addressed this in the mid-2010s. Now, all boilers and parts are available from most plumbing merchants such as Plumbase.