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Green Gold


Green Gold is a large complex of five buildings. It consists of one shopping center, one Hilton Hotel, one big underground parking garage, the croation football association, a congress center, office spaces, night clubs, and restaurants. The complex is located at the center of Croatia´s capital Zagreb.


Many different protocols like KNX, Modbus, BACnet or M-Bus have been used in this project. On special thing to mention about this project is, that the complex has its own electrical, heating and energy production. Depending on the price status of the energy market it produces energy for own usage or for sale. The main goal was to achieve an overall control of al building functions with one central software. In this case the NETx BMS Server controls the building production and consumption. It automatically starts saving mode by shutting down non-vital parts when excessive energy consumption is detected. Critical events are analyzed and predicted via constant on line consumption monitoring.

Maximal effort was made on graphical design of control interface to achieve high ergonomic and aesthetic standards on client side, so anyone can easily navigate through visualization interface.


NETx BMS Server: 3,000 data points

NETx BMS Clients: 5

NETx KNX OPC Server: 8 gateways

NETx Voyager: 15,000 elements/153 pages


Trades: Lighting, HVAC

System integrator: HFC grupa d.o.o.

Technology: KNX, BACnet, Modbus, M-Bus