Hello, Aika. There is a Type557 in the TESS library for the vertical ground heat exchanger based on the DST model from Hellstrom. Best Regards Chun Kwong LEE University of Hong Kong Quoting �邿迣迮�邽邾 苤迮邿迡�訄郅邽迮赲訄 <i.gera@mail.ru>: > > Dear all,� > > Which type of component to use for GLHE ground loop heat exchanger? > > Thanks� > Aika > >