Which? endorsed boilers

Viessmann has secured a Which? Best Buy status for its six most popular Vitodens gas boilers for the second year in succession. The annual survey by Which? – the UK’s largest consumer organisation – conducts robust research in order to “reveal the boiler brands you can trust.”

In the overall brand assessment – based on reliability, customers’ scores, and the expert views of engineers – Viessmann’s scored second place in the table. Which? reports that the survey again resulted in “a huge difference in overall score between the best boiler brands and the worst.”

Which? conducted the survey in May 2018, questioning just fewer than 12,000 boiler owners and 166 heating engineers who are registered Trusted Traders. The report stated that Viessmann’s boilers “have excellent build quality, are easy to repair and even non-incentivised heating engineers would recommend them.”

The six Which? ‘Best Buy’ boilers from Viessmann are:

  • Vitodens 050-W 29 kW Combi 
  • Vitodens 100-W 30 kW Combi 
  • Vitodens 100-W 26 kW Open Vent 
  • Vitodens 111-W 35 kW DHW Storage 
  • Vitodens 200-W 30 kW System
  • Vitodens 200-W 60 kW System 

What does Which? say about Viessmann?

  • Fantastically reliable boiler brand
  • Many engineers put Viessmann on apedestal as the very best on the Market

"A quality product, great price, and in my opinion the best warranty offered over all otherboiler manufacturers. They’re just the best boileryou could ever fit for your favourite customers."(Which? Trusted Traders heating engineer)

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