As a leading example of a strong and reliable combi boiler, the Viessmann Vitodens 050-W is a premium, affordable boiler, with an extended warranty of 10 years. It's fitted with an Inox-Radial Stainless Steel heat exchanger, which is patented/made by Viessmann themselves.
The compact design of the award-winning Viessmann Vitodens 100-W offers you multiple options regarding where you can install this combi boiler without needing access from the sides. It’s quiet, efficient and light-weighted making it one of Viessmann’s most popular boilers throughout the range. It also comes with a 10-year extended warranty and Inox-Radial Stainless Steel heat exchanger.