Viessmann System Boiler Review:

Viessmann Boiler

Viessmann System Boiler Review:

Brand: Viessmann

Model: Vitodens 100-W Gas System Boiler

Details: The Viessmann Vitodens 100-W System boiler is a reliable and fantastic wall mounted gas condensing boiler. 

These gas system boilers are available for prices around £1000, making it a great choice for any home that wants a top-quality but affordable system boiler.

The Viessman Vitodens 100-W comes in 26kW, 30kW, and 35kW system boiler sizes.

This system boiler is perfect for larger homes with more than four people, or more than one bathroom, where the demand for hot water is high and multiple taps at once.

What do we love about this boiler?

The Viessmann Vitodens 100-W System Boiler comes with an efficient and reliable Inox-Radial heat exchanger with a MatriX cylinder burner. 

The cylinder ensures the heat is distributed cleanly and efficiently and won’t corrode or fail as with most other boilers.

With a high modulation ratio of 1:6, the boiler reduces or increases its operating power for any given room environment. This reduces heating bills and wear and tear.

The LCD touchscreen makes this system boiler easy to use, and It also comes with an optional external weather detector. What does this mean? It means that the detector allows the boiler to react to outside weather conditions and increase or decrease temperatures accordingly.

This system boiler rates ‘A-Class in the SEDBUK energy efficiency ratings.

Main Features:

  • High modulation ratio of 1:6
  • SEDBUK A Rating
  • MatriX pre-mix cylinder burner and an integral AquaBloc hydraulic unit
  • Various Kw Heating Output -26kW, 30kW, and 35kW
  • Very Quiet Boiler
  • Optional external weather detector
  • Advanced technology
  • Which Rating 76%
  • LCD touchscreen
  • Compact size
  • Lightweight
  • 5- year parts and labour warranty as standard (Up to 10 years with Viessmann Installer)

Overall, we would recommend this system boiler above all others due to quality, performance, lengthy warranty and price. 

With installation, you can expect a cost between £1800-£2200 depending on the company who installs it. 


If you’d like a new system boiler quote, then click here as we can provide you with a custom quote including installation fees for your home specifically so you can get an idea of the total cost for you. 


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