Flat collectors

Geothermal heat from a flat collector
Flat collectors generate energy from sun and rain. As a result, the soil above the flat collector must not be sealed: no tarmac, concrete, etc. It is also not possible to plant vegetation with deep routes.
The flat collector as the energy source for heat pumps is particularly cost-effective and is consequently commonly used on large premises. Several hundred metres of plastic pipes are routed 1.2-1.5m below the ground (exactly: 30cm below the frost line). An anti-freeze agent is pumped through the plastic pipes to make use of the free geothermal heat.
The length of the pipes and the area used depends on the heating demand of the property and the heating output of the soil. As a rule of thumb, calculate with double the living space inside the premises. However, make sure to exactly calculate the required area.

Flat collectors



Flat collectors are cheap to install but require a large surface below the garden.


Direct evaporation is the most efficient geothermal heat application for confined areas.


Heat pumps with deep drilling are the safest variant: they require a minimum of space, have a long service life and are suitable for heating and air conditioning.


Groundwater technology is highly efficient and requires little space: the energy is drawn from the earth using two wells.