Which? uses cookies to improve our sites and by continuing you agree to our cookies policy

Viessmann Vitodens 100-W System 35kW review

Launched Assessed -

Typical price


This Viessmann Vitodens 100-W 35kW system boiler has a large digital display and is compatible with a range of programmers, including an optional external weather detector that automatically adjusts your heating when the temperature drops outside. Read our full review to find out whether the Viessmann Vitodens 100-W 35kW is the right boiler for your home, and how satisfied Viessmann owners are with this brand of boiler.
Is it worth your money?
Or is it a waste of cash?
  • Efficiency rating

    score is available for members only
  • Brand reliability

    score is available for members only
  • Brand customer score

    score is available for members only

The Which? difference

As well as thousands of impartial product reviews from our Test Labs, a Which? membership also gets you:

  • Unlimited access across which.co.uk
  • Advice on the move with our apps
  • Which? magazine delivered to your door
  • The inside scoop on important issues, from scams to savings accounts

Which? can help you make good decisions

Related articles