Less is more every Viessmann product design is based on this principle. The design ethic is consistently applied in the living space. First and foremost, users expect excellent performance, long-lasting reliability, and efficient energy utilization with no superfluous details. The two interlocking cylinders with precise sensor fins epitomize the functional design. The clear lines and intuitive structure of this product make the “indication” and “turning” control functions self-evident. The reduced formal language creates trust in the precise control functions.