Optimized solutions for your energy supply

GTN has a team of highly qualified employees with many years of experience in the field of conventional and renewable energies for large industrial and municipal projects. In addition, we develop concepts for heating and cooling with sustainable and economically efficient technical systems as part of the construction and renovation of buildings for administration, public institutions, research, teaching and housing.  

Our experts have accompanied numerous energy projects from the concept and the technical planning, through the support of tendering and awarding oft he contract, to the construction supervision and commissioning and, finally, also to the monitoring of the system to the satisfaction of our customers.


GTN offers a wide range of engineering services in all phases of project development from the first plant concept through to operational monitoring and optimization of the systems in operation.  

Our fields of activity include the production technology and surface thermal water loops of geothermal systems as well as heat production systems (heat pumps, boilers), cold production systems (free cooling, chillers, ice stores, reversible heat pumps), systems for electricity generation, heat and power cogeneration plants, above- und underground heat and cold stores, local and district heat supply grids, building’s internal heat and cold distribution systems.

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The projects of GTN are extremely diverse. We ensure the project’s success through our interdisciplinary approach which also promotes innovation, secures quality and increases efficiency.