Viessmann’s Vitotronic 300 GW6B boiler control system features a smart operating interface that is easy-to-use with text-driven menus. The Commissioning Wizard ensures fast and simple boiler startup. Boiler configuration options include integrated cascade / boiler sequencing function for standalone or up to eight lead-lag boilers. Single Vitogate 300 gateway communicates with up to eight boilers and allows for simple BAS integration. The Vitotrol App for Apple and Android devices offers worldwide access to your heating system.