The Borehole Heat Exchangers

Eneren can install horizontal and vertical closed-loop geothermal systems

The Borehole Heat Exchangers

The geothermal heat exchangers (or Borehole Heat Exchangers – BHEs) consist of polyethylene pipes that are installed vertically in the ground that allow the circulation of a fluid in their interior, which descends and ascends within them by exchanging heat with the subsoil, following a "U-shape". In some cases the pipes can be installed horizontally. Thanks to this heat-carrier fluid, in winter the heat is absorbed from the ground and used by the heat pump, while the reverse takes place during the summer.

Eneren offers pre-assembled BHEs, built, tested and certified by well-known brands of leading companies in the production of polymeric accessories.

The use of certified materials, combined with correct installation steps that follow the highest known standards, allows Eneren to issue certificates of guarantee for geothermal probes for a period of 10 years and for an amount of € 10,000.00 for each installed BHE.


1. the ground is drilled;


2. the BHEs are introduced in the hole with one or two "U-shape" pipelines, generally made of polyethylene (PE 100 or PE-Xa),


3. a suitable spacer is placed to maintain the geometry of the geothermal probe, avoiding short circuits and ensuring a homogeneous distribution of the heat-conducting cement around the pipe. In addition it seals the well in order to ensure the original environmental integrity.


The installation of the vertical BHE’s becomes one of the phases at which Eneren pays particular attention. Innovative drilling technologies, high quality materials, installations in compliance with guidelines and environmental regulations, are all prerogatives of the guarantee that Eneren provides to its customers in the top-class installation of its geothermal exchangers.

Eneren installs the pipes with a double head rig with coating for the whole length of the well.