tewag GmbH
tewag Technologie Erdwärmeanlagen Umweltschutz GmbH
Starzach, Germany
About
Founded in 2006, tewag GmbH is a private company headquartered in Starzach, Germany with approximately 11-50 employees specializing in Geothermal.
tewag GmbH is an independent planning office for geothermal energy and environmental protection based in Starzach, Germany. Founded in 2006, the company specializes in engineering and consulting services for shallow and deep geothermal systems, with a team of over 20 specialists in geology, geography, engineering, and business administration. The company has successfully implemented more than 14,000 geothermal systems. Key expertise includes planning and simulation of geothermal borehole fields, thermal response testing, subsurface modeling, energy pile systems, surface collector systems, cold district heating networks, and thermal utilization of surface water bodies. tewag is involved in extensive research and development projects funded by federal agencies, focusing on quality assurance and sustainable subsurface management. The company is part of the Rietzler Group, which combines competencies in renewable energy, geothermal systems, and environmental remediation across 350+ employees.
Headquarters
Founded
Employees
Company type
Focus areas
Products & services
Business models
Value chain
Service areas (5)
Planning and engineering
Planning services for geothermal utilization, site parameter assessment via thermal response testing, subsurface modeling, and long-term temperature monitoring of district heating networks.
Geothermal systems
Planning, design and long-term simulation of borehole fields, energy pile systems, and surface collector systems for ground-source heat pump systems.
District heating and cooling
Planning and implementation of multivalent heat source systems in district concepts, hydraulic and thermal modeling of district heating networks.
Geothermal well systems
Design and planning of geothermal well systems including deep boreholes and direct evaporator probes.
Groundwater utilization
Groundwater use and subsurface desulfurization and demanganization for efficient heating and cooling systems.
Locations
Headquarters
Am Haag 12, 72181, Starzach, Germany
Operating locations (2)
- Große Kirchgasse 1, Lohr am Main, Germany
- Schnorrstraße 5a, Nürnberg, Germany
Projects
14Terra-Solar-Quelle
Research project combining earth heat collectors (EWK) with solar collectors to optimize geothermal heating with reduced ground area requirements. Demonstrated efficiency improvements with over 50% reduction in EWK area.
Kalte Nahwärmeversorgung Sonnenberg
Cold district heating network for settlement heating and cooling using centralized ground source field with decentralized heat pumps.
Kalte Nahwärmeversorgung Grüne Höfe
Cold district heating network implementation for settlement.
FluSeeQ
Research project focusing on utilization of thermal potential from surface water bodies through heat extraction with sustainable regulation and new technology. Project coordinator role. Started October 2024, 4-year duration.
Henninger Turm Frankfurt
Large-scale inner-city geothermal borehole project in Frankfurt am Main.
Quartier Kloster Areal Pluggendorf-Münster
Geothermal heating and cooling system for district development.
Hohe Düne Gifhorn
Geothermal project in Lower Saxony.
Bühnsee
Thermal water utilization project from lake water.
Rossneckar Esslingen
Thermal water utilization from river for residential building heating and cooling.
ZIM Kooperationsnetzwerk Oberflächennahste Geothermie und Kalte Nahwärme 4.0
Network project combining shallow geothermal up to 5m depth with cold district heating 4.0 developments. Started January 2019.
Quartier Elzmättle Emmendingen
Geothermal district heating and cooling for development area.
Killberg IV Hechingen
Geothermal heating project.
Baugebiet Auf Laim Murg
Geothermal heating system for residential development.
GeoSurf
Development of a measuring tool for efficient planning of shallow geothermal systems.
Credentials & affiliations
Certifications
Member of Bundesverband Deutscher Geowissenschaftler
Awards
Forschungssiegel INNOVATIV durch Forschung
Industry memberships
Partnerships
ISFH, Bundesverband Wärmepumpe e.V., Universität Erlangen-Nürnberg, Fraunhofer ISE, Friedrich-Alexander Universität Erlangen-Nürnberg
People
Management & team
Prof. Dr. Simone Walker-Hertkorn
Managing Director
Dr. Markus Kübert
Managing Director
Dr. Ruth Maier
Dr. Paul Fleuchaus
Dr. Rike Köpke
Kathrin Singer
Barbara Baur
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