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There are three main models in the current combi range from Viessmann boilers. All of these models are A-rated for efficiency and come with a heat exchanger guarantee valid for 10 years against corrosion. Viessmann boilers are renowned for using the newest technologies and as a consequence each model makes use of a stainless steel Inox-Radial heat exchanger for top performance.

Vitodens 100

This model is easily the smallest combi boiler manufactured by Viessmann and it comes in two output sizes – 24kW and 30kW. They are both rated as being 97% efficient and each benefits from a pre-heat function that results in the fast delivery of hot water.

Vitodens 200-W combi

This new model from Viessmann also comes in a range of output sizes – these being 26kW, 30kW and 35kW. Each has a plate-type heat exchanger for immediate hot water delivery and is fully modulated for optimum performance in all weather conditions. In addition, this model is available in natural gas and LPG forms.

Vitodens 333

The largest of the combi range, the Vitodens 333, has a built in water storage unit that holds up to 86 litres and this therefore gives the equivalent of 250 litres water storage.

Conclusion

In addition to the features mentioned above, Viessmann combi boilers are all easy to install and provide easy access for servicing and maintenance. They range in size quite dramatically, however, they are all wall mounted and stylish in appearance making them suitable for even the smallest kitchen space.