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The annual survey by Which?, the UK’s largest consumer organization conducts robust research in order to “reveal the boiler brands you can trust.” Viessmann is also one of only two boiler brands to score five stars for reliability, customer satisfaction, and engineers’ recommendations.

Brand assessment survey

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.” The report stated that the boilers have an excellent build quality, are easy to repair

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 an excellent build quality, are easy to repair and even non-incentivized heating engineers would recommend them.”

Scoring a top rating

Graham Russell, Viessmann Managing Director, commented, “We are delighted to receive this endorsement for the second year running. It is reassuring to hear from a respected independent source that our Which? Best Buy boilers are pleasing end-users. And it is especially satisfying to score a top rating from heating engineers.”

We believe this reflects the fact that many more installers are becoming familiar with Viessmann products and we hope more still will give us a try in the coming year.”

The six Which? ‘Best Buy’ boilers

These include:

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