Graham Russell
![Graham Russell](https://www.thebigredguide.com/img/people/graham-russell-300x300.jpg)
Graham Russell
Managing Director, ViessmannGraham Russell is the Managing Director at Viessmann. He has over 13 years of work experience while working in Viessmann.
News mentions
Viessmann introduced the next-generation of its most popular gas-condensing boiler, the Vitodens 100-W, with industry-leading capabilities for installers. The WiFi-integrated Vitodens 100-W’s ne...