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Made from renewable raw materials

Due its physical design and storage properties, the GEOKOAX ground heat exchanger requires much less freeze protection than conventional U-bends. This increases conductivity. The frost protection of the GEOKOAX biological heat carrier fluid CORACON GEKO E is based 100 % on renewable raw materials, while conventional brine fluids are based on fossil monoethylene glycol or monopropylene glycol. CORACON GEKO E contains biodegradable materials, which have been even approved for food use, to prevent system corrosion.

Conventional liquids

We offer CORACON GEKO N, a liquid for application in less sensitive areas. This brine can be used with a proportion of as little as 17 Vol-%, as it contains sufficient anti-corrosion agents.

Our Projects

Effective all types of geology, with any heat pump system, in new and existing buildings, in all sizes. GEOKOAX products have a proven track record with more than 1,200 installations. Our projects are our best recommendation.

What geothermal energy offers

Use free geothermal heat not only to heat your property, but also to cool it. Operating costs are minimal, the energy generated is environmentally friendly and – in most countries – eligible for government grants.


Spanning properties ranging from residential and commercial buildings to hospitals and office buildings and including open-air structures such as bridges and railroad switches - GEOKOAX will heat and cool whatever you require.