vilisto is a Hamburg-based climate protection company that uses digital heat management to reduce energy consumption in non-residential buildings. At the heart of the energy-saving solution are intelligent thermostats that use patented, integrated sensors and self-learning algorithms to detect room usage and automatically optimize the indoor temperature. This not only saves up to 32 percent of heating energy, but also reduces CO2 emissions. The technology is aimed exclusively at non-residential buildings such as schools, kindergartens, offices, and so on.

As of October 2024, the Building Energy Act mandates that water-based heating systems in buildings with six or more units must be inspected and optimized. This can be done by means of hydronic balancing, among others. Balancing is even mandatory for new heating systems and new buildings (§60c GEG). Considering the energy transition and the significant CO2 emissions of existing buildings, experts recommend hydronic balancing as nearly always beneficial. In many cases, buildings that have not been properly calibrated face issues with rooms being too cold or too warm, leading to substantial potential for energy waste.

The new vilisto.balance software is installed on the intelligent vilisto thermostats and performs hydraulic balancing automatically and in just a few minutes. For the certification of this solution by TÜV Rheinland, extensive simulation models were created using the XRG HVAC Library, exported as FMUs, and coupled with the vilisto software using the software-in-the-loop method. This convincingly demonstrated the overall effectiveness of centrally controlled valve control. The new Pressure Mode calculation method, which is characterized by its enormous robustness, ease of use, and simulation speed, is available to HVAC Library users starting with version 3.4.0.

The press communication in german can be read here ...