Heilbronn Residential Buildings Cut Energy Use with IoT Heating Upgrade

Image source: Metr

Published on March 27, 2025

Stadtsiedlung Heilbronn has implemented an IoT-based modernization of more than 120 heating systems across its residential properties, aiming to improve energy efficiency and reduce carbon emissions. The project, in collaboration with smart building provider metr and Deutsche Telekom’s connectivity solutions, enables remote monitoring and automated optimization of heating systems.

The upgrade covers multifamily buildings constructed between 1921 and 2018, incorporating various heating technologies, including gas boilers, combined heat and power systems, and heat pumps. Older systems were retrofitted with IoT sensors, while newer ones were directly integrated with digital controls. The solution is set to be fully operational by the 2025/2026 heating season.

Using Deutsche Telekom’s secure network, real-time data on temperature and energy consumption is transmitted to metr’s cloud platform, where machine learning algorithms optimize heating performance. The system adjusts based on weather forecasts and usage patterns, potentially reducing energy consumption by up to 20%. Operators can monitor performance via a centralized dashboard and receive automated fault alerts.

The project received partial funding from Germany’s Federal Grant Programme for Efficient Buildings, supporting efforts to enhance sustainability in housing.

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