The article reports on a newly realized experimental ground heat exchanger (GHE) which has been built up as an accessory of an experimental low-energy dwelling of Faculty of Mechanical Engineering, Brno University of Technology (FME BUT)., and analyzes some aspects of its project, especially the choice of proper tubing. Based on a simplified computational model, the impact of four most employed tubing types on a performance and an effectivness of the GHE has been judged and benefits of particular tubing types were compared with their investment costs. Finally, using of KG-Systém (PVC)® SN4 was evaluated as the best variant. and Obsahuje seznam literatury a názvosloví