Geothermal pump costs: what geothermal heating really costs
The biggest cost block is not the heat pump, but the drilling. Cost blocks, pricing examples by building type and the 20-year comparison to the air-to-heat pump.
Find out more
Knowledge Hub
Answers to the questions really asked about geothermal energy
Costs, technology, old construction, cooling, operation. Written by the manufacturer, not the portal. Each item shall bear a visible verification date; Annual themes such as promotion and prizes are revised annually.
The start
The article you should start with
All articles
Ordered by topic
Specialist articles on technology and planning – arranged by topic.
Understanding technology
Frequently asked: thermal short-circuiting (part 1)
Why an borehole heat exchanger can do less than calculated, and how the heat exchange between Vor- and return can be avoided by design.
Find out more
Frequently asked: thermal short-circuiting (2/2))
How relevant is the heat exchange between the pre- and return of a borehole heat exchanger (BHE)? Simulation, practical operation and planning conditions at a glance.
Find out more
How does a geothermal heat pump work?
A geothermal heat pump uses heat from the substrate and raises it to a usable temperature level via three interconnected circuits.
Find out morePlanning and dimensioning
Planning short borehole heat exchangers efficiently
A schoolhouse plan comparison shows how a ground probe field can be designed thermally and hydraulically at a limited drilling depth.
Find out more
Geothermal correctly dimensioned: Comparison of variants in demanding geology
Two simulated Earth probe fields in comparison: total drilling length, depth, diameter, hydraulics and fluid temperatures in demanding geology.
Find out more
Next step
Reading answers a lot. Calculate the rest.
The separatus calculator compares geothermal energy and air heat pump with the key data of your building.
cost comparison start now