Underwater Heat Exchangers

Limnion – Underwater Heat Exchanger – Ideal for lakes, ponds and rivers


Go Geothermal always search for best in class solutions.  Having exclusive access to Frank GmbH we are excited to be able to offer the new Limnion here in the UK.

Whilst traditional coils and Pond Mats have been used successfully on many projects this new solution answers many of the shortcomings of the traditional solutions.  Particularly on larger builds or in challenging lake/river conditions the issues of silt build up and leak integrity are paramount in the design of the Limnion.
Contact Go Geothermal Ltd to discuss your particular project.

Heat Exchanger for Lakes and Rivers, can be used for heating and cooling:


  • Alternative to Pond Mats, Ground Source Probes and Horizontal Collector Systems
  • Compact Heat Exchanger Unit for easy installation
  • Extremely Efficient due to optimised flow


  • No uncontrolled PE pipe in lakes and rivers
  • Needs far less space than Pond Mats
  • No encrustation of heat exchanger transfer surface
  • Strong and stable housing for the protection of heat exchanger pipes
  • No corrosion – 100% PE, no metal parts
  • No moving parts
  • Several successful projects across Europe

*Depth required – Minimum 3.5m


underwater heat exchanger