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Challenge / Goal

Energy saving. Reduction of heating costs. Control and monitoring of radiator thermostats. Centralized management. Simple retrofits and conversions with minimal installation effort and minimal to no structural changes to existing building and plant infrastructure. Simplest retrofit solution! Individually adaptable and usable. Scalable from individual radiators to complex holistic buildings or entire neighborhoods. Automatic control and regulation. Remote shutdown of individual radiators. Identification of defective thermostatic valves.


ZENNER BuildingLink is an IoT solution for the control of smart radiator thermostats and enables the regulation of the heating behavior of quarters, buildings or parts of buildings. With just one click, target temperatures for buildings, floors, zones or specific rooms can be adjusted to the usage behavior, thus saving up to 31.5%* energy. LoRaWAN® makes implementation fast, easy and economical.

*Source: Case study, Institute for Technology and Management in Building Operations (TMB), Karlsruhe Institute of Technology (KIT).
Installation of heating thermostats with LoRaWAN in direct replacement of existing thermostats.

Frankfurt City bank administration building 37,000 sqm! plus the companies kindergarten. => > 500 thermostats Exemplary in the meantime several buildings in Germany were equipped with BuildingLink.

City of Wiehl => high school and public administration buildings > 500 thermostats.

Various municipalities, town halls, kindergartens gymnasiums of smaller cities as POC in total >300 thermostats

Installation of ZENNER LoRaWAN Indoor Gateways.

Establishment of a constant power supply (socket)

Building registration, and thermostat registration in the management platform, setting up the heating schedule per room / floor / building....

Central settings in the software control platform, heating schedules, target values and alarm levels.

Easy retrofitting ca. Effort of thermostat installation inc.l systemic detection ca. 3-5 min per device.

BuildingLink uses the LoRaWAN network Europe of ZENNER Connect GmbH. Currently one of the largest LoRaWAN networks in Europe with over 5.2 million end devices and 72,000 gateways.

Data transmission is secure, robust, scalable and extremely cost-effective due to the standardized LoRaWAN protocol.



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Time period

Planning time: Less than 6 months

Implementation time: Less than 6 months


ZENNER; DIY by facility manager & Building management with the support of an installation company. Projects can be implemented independently by the customer!

Service providers

ZENNER International

End users

Facility managers; Building managers; Energy suppliers and municipalities; Public administration; Optimal for public buildings such as schools; Kindergartens; Gymnasiums; City halls; Office buildings, commercial buildings Hotel & Gastronomy; but also in the housing industry

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