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Plan your geothermal projects from your computer


geoSIM assists geologists, construction planners, architects, drilling companies, and heating and/or cooling engineers with easy and quick planning of any size of geothermal ground heat exchanger systems. The freeware offers a wide range of design and planning options for all energy load requirements and circumstances. It allows for the inclusion of Thermal Response Test (TRT) results and the control of the simulation process with individual thermal borehole resistance values.

The geoSIM tool’s easy and intuitive user interface and its quick calculating times help reduce your daily workload. The project files are customizable for your individual needs and can be used for project calculation, management and archiving at the same time.

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.