GeoTHERM Expo & Congress in Offenburg
25–26 February 2027 | Messe Offenburg-Ortenau GmbH, Offenburg, Germany
GeoTHERM is a specialist expo and congress for near-surface and deep geothermal energy. Organised by Messe Offenburg-Ortenau GmbH, it brings the geothermal industry together for exhibitions and professional exchange. The 2027 edition marks the event’s 20th anniversary and names Iceland, Scotland and France as guest countries, giving the programme an international focus.
Why visit Offenburg GeoTHERM?
The event brings an exhibition and congress together around one energy source: heat from the earth. Visitors can use the exhibition to review technologies, services and project approaches, while the congress offers a setting to discuss technical developments and practical questions. These are useful starting points for comparing options against a specific site, heat network, operating challenge or project plan.
Compare approaches
For planners and project teams, the value lies in testing assumptions and identifying which technical questions need a closer answer. Prepare a short project brief and compare suppliers’ explanations against your requirements rather than collecting general product information.
Connect technical and regional perspectives
Operators, energy suppliers, local authorities and researchers can bring different questions to the same specialist setting. The 2027 guest-country participation includes Iceland, Scotland and France; the organiser says energy-sector speakers from those countries are expected in the opening session.
Who should visit Offenburg GeoTHERM?
Geothermal planners and project developers
Use the event to explore technologies and services relevant to near-surface or deep geothermal projects. Before attending, define the project stage, the energy use under consideration and the evidence you need to compare possible approaches.
Geothermal plant operators
Operators can focus on technologies, services and practical experience that relate to running geothermal systems. Prepare questions around operating requirements, maintenance, integration and the information needed to assess a supplier’s proposal.
Local authorities and municipal energy teams
GeoTHERM may help public-sector teams frame questions about geothermal heat for local or district networks. Bring the network or public-building context, the intended heat use and the technical questions that need specialist input.
Energy suppliers and heat-network professionals
Visitors working with heat supply can compare how geothermal energy may fit their network or project requirements. Keep heat demand, system interfaces and delivery constraints in view when discussing options.
Researchers and technical professionals
The expo and congress bring together industry, research and public-sector perspectives on near-surface and deep geothermal energy. Use the congress to compare viewpoints and identify topics that warrant further technical investigation.
What can you explore at GeoTHERM?
Near-surface geothermal energy
The event identifies near-surface geothermal energy as one of its two central subject areas. Visitors can use this focus to organise questions about the applications, systems and services relevant to their own work.
Deep geothermal energy
Deep geothermal energy is the other central subject area. For project teams, discussions may relate to the requirements of a specific site, the intended use of the heat or power, and the evidence needed before advancing a project.
Technologies, services and projects
The organiser describes exhibitors as presenting technologies, services and projects related to geothermal energy. The detailed 2027 exhibitor directory and congress programme should be checked through the organiser as they are released; the current programme page says the 2027 congress programme will be published shortly.
How to prepare for Offenburg GeoTHERM
- Set a purpose. Decide whether you are evaluating a project, operating a system, planning a heat network, researching the sector or presenting a solution.
- Write down the technical context. Note the site or network, intended energy use, project stage and constraints relevant to your work.
- Prepare comparison questions. Ask suppliers how their technology or service fits the application, what evidence supports performance claims, what site conditions matter and which permissions or studies may be needed.
- Prioritise conversations. Identify the exhibitors, congress topics or guest-country perspectives most relevant to your objective, then leave time to follow up on useful discussions.
- Check current event information. The organiser says the 2027 congress programme will be published shortly. Review the latest programme and visitor information before finalising your plan.
Using the congress and international programme
The detailed 2027 congress programme was not yet published on the organiser’s programme page when checked. A separate 2027 announcement confirms that Iceland, Scotland and France are guest countries and that energy-sector speakers from those countries are expected in the opening session. Treat these as announced programme elements; do not assume other sessions or speakers until the organiser releases them.
When the programme is available, select sessions that address your work and note any questions to take into the exhibition. Researchers, engineers, operators and public-sector teams may find it useful to compare technical viewpoints with the project and market context they already know.
Exhibiting at Offenburg GeoTHERM
The organiser invites companies presenting geothermal technologies, services and projects to exhibit to a specialist geothermal audience. A clear exhibit objective could be to explain the application your solution serves, the evidence available to support its use and the questions a prospective project partner should consider. The event’s exhibitor information also lists a start-up area and a Young Innovators programme; check the current organiser information for participation conditions and availability.
After Offenburg GeoTHERM
Turn useful conversations into defined next steps. Record the organisation, the technical topic discussed, the documents or data requested and who will follow up. For supplier discussions, compare proposals against the same site or network requirements and request the technical and project information needed for your own assessment. For research or policy discussions, note the claims that require independent validation before they inform a project decision.
Offenburg GeoTHERM at a glance
| Item | Information |
|---|
| Event | GeoTHERM Expo & Congress |
| Dates | 25–26 February 2027 |
| Venue | Messe Offenburg-Ortenau GmbH, Schutterwälder Straße 3, 77656 Offenburg, Germany |
| Organiser | Messe Offenburg-Ortenau GmbH |
| Main subjects | Near-surface and deep geothermal energy |
| Audience | Planners, operators, local authorities, energy suppliers, researchers and geothermal companies |
| 2027 programme | Congress programme to be published shortly; guest countries are Iceland, Scotland and France |
| Opening hours | Thursday 25 February: 09:00–17:30; Friday 26 February: 09:00–15:30 |
Is Offenburg GeoTHERM worth visiting?
GeoTHERM is most relevant to professionals whose work touches near-surface or deep geothermal energy, including project planning, operations, heat supply, public-sector energy planning, research and technology provision. Its focused subject and combined expo-and-congress format can support purposeful comparison and technical discussion. The value of a visit depends on matching the exhibition and sessions to a defined project, operating or research question.
Make a focused visit
What geothermal project, system or decision do you want to understand better? Bring that question to the exhibition and congress, compare the evidence available and record a concrete next step. Prepare. Compare. Discuss. Follow up.
Geothermal energy opportunities in Germany
Market size and demand
The German EITI’s deep-geothermal overview reports 42 deep geothermal plants in operation as of January 2025. It reports 1,795 gigawatt-hours of available heat and 214 gigawatt-hours of gross electricity generation in 2024. The source says geothermal energy in Germany is used primarily for local and district heating; these output figures describe existing national production, not guaranteed demand for a particular supplier or project.
Market drivers and commercial opportunities
The documented use of deep geothermal energy for local and district heat gives project developers, equipment and service providers a basis for investigating heat-network applications. The EITI overview also describes process heat for industry as an application. Each opportunity depends on local geology, project economics and site-specific assessment.
- Heat-network projects: suppliers and developers could assess how geothermal heat systems and related services fit a defined municipal or district-heating project. The national output data does not establish a local project pipeline.
- Project engineering and subsurface services: specialist firms could investigate needs around exploration, wells and geothermal project development. Geological uncertainty, capital requirements and project approvals are material barriers.
Regulations and market-entry conditions
The German EITI overview states that deep geothermal energy is accessed through wells that require a mining permit. Applicability and project requirements need to be confirmed for the specific site and project; the information here is not a complete guide to German permitting.
What this means for exhibitors
Exhibitors may use the event to explain how their technology or service fits heat-network and geothermal project requirements, while independently assessing geology, permitting, finance and local demand. No buyer access or commercial outcome is assured.
What this means for visitors
Visitors could compare suppliers and project approaches for geothermal heat and related services, then identify which technical, geological and permitting questions need specialist review. The national production figures are context for market research, not a forecast for an individual project.
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