About us

Welcome to GNV

Your specialist for geothermal systems

Many construction projects in which geothermal energy is planned as a sustainable source of heating and cooling cannot be completed on time. This is due to long production and delivery times for geothermal components. At the same time, climate change is progressing ever faster and it is high time to do something about the destruction of our environment.

We at GNV want to solve both problems. We have recognized that the heat transition can only be achieved through new technologies and innovations.

That is why we produce distributors for geothermal and ice storage systems with fully automated processing methods. In this way, we ensure a fast and reliable supply of geothermal components throughout Europe and thus counteract global climate change.

Our products

Geothermal heat distributor

The geothermal manifold is an important device for hydraulic balancing of the geothermal probe, for venting the system and for individual control of the probes. With our identical plastic flow meters, you have a choice of four different sizes.

Geothermal shafts

Shaft for installing the geothermal heat distributor outside the building. A shaft keeps condensation away from the building, provides easy access for tradesmen and replaces a boiler room. We can easily install shaft systems with up to 125 probes.

Well shafts

Our polyethylene well shafts are significantly lighter, do not require complex core drilling, have prefabricated connections and can be installed quickly. These are advantages that conventional concrete rings cannot offer. At GNV, the well shafts can be customized.

Ice storage systems & energy fences

We can offer ice storage systems and energy fences in all variants thanks to our high level of automation. We can offer our ice storage systems and energy fences in all variants thanks to our high level of automation.

Technisches Zubehör

Für den fachgerechten und wirtschaftlichen Einbau von Erdwärmesystemen erhalten Sie bei uns das erforderliche Zubehör an Bauteilen, Hilfsvorrichtungen und Schweißgeräten.

Our history

From domestic garage to industrial company

GNV GmbH, based in Geisa in the Thuringian Rhön region, is one of the world’s leading manufacturers of geothermal components. The second-generation family business has been developing and producing geothermal shafts, geothermal distributors, well shafts and ice storage systems since 2006. Thanks to innovative manufacturing processes and new technologies, GNV GmbH is now regarded as a pioneer and market leader in the field of geothermal systems. Since then, the family-owned company has been tackling the problems of the future and driving forward the heat transition.
Sandro Neumann, Managing Director GNV GmbH
„My dream is to leave the planet better than I found it. Das ist einer der ausschlaggebenden Gründe, warum ich die Firma meines Vaters, Georg Neumann, übernommen habe. As an entrepreneur, I have a great deal of leverage to positively influence my environment so that future generations can also experience a planet worth living on in the future.””
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The story

2005
GN Schweisstechnik GmbH is founded by Georg Neumann
Worldwide distribution of plastic welding machines.
2006
Expansion of the business segment
The focus shifts to the production of distribution shafts for geothermal heating systems.
April 2007
Sandro Neumann joins the family business
Construction of a production line in the garage of their own home on an area of 20 m².
2010
Expansion through a new production facility

Comprehensive expansion of the production area with offices and storage facilities to an area of 150 m².

2019
Generational change and takeover

Sandro Neumann takes over GN Schweisstechnik GmbH as owner and managing director.

2020
Produktion 4.0
Development of digitalized and automated production begins.
2020
Expansion of the business segment
The development and production of ice storage systems is being expanded.
2020
Entwicklung innovativer Produkte und Maschinen

Eigene Bauteile zur effizienteren Produktion werden konstruiert und hergestellt.

2022
Hessischer Gründerpreis

Die GN Schweisstechnik GmbH wird als Preisträger in der Kategorie “Zukunftsfähige Nachfolge” ausgezeichnet.

Oktober 2022
New building in Geisa
GN Schweisstechnik relocates its headquarters to Geisa in Thuringia. From now on, GN Schweisstechnik GmbH produces geothermal systems for the whole of Europe on an area of 1,250 m².
Januar 2023
GN Schweisstechnik GmbH becomes GNV GmbH
The renaming is intended to clarify the focus. The V stands for distribution systems.
März 2023
Projekt Luke
GNV GmbH puts its specially developed “Luke” robot into operation. This robot system makes the company a world leader in the welding of geothermal and ice storage distribution systems.
November 2024
New GN X series
After almost a year of development, the new GN X series goes into production with the GN X1 and GN X2. The distribution shafts are unique in their kind in Europe.

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