Forest Eco Systems have been working closely with Network Rail and Stiebel-Eltron to deliver heating/(passive & Active) Cooling also installation of (PV) Photovoltaic 4.32kWp Panasonic HiT system to produce free electricity and free renewable heat for a new development at Cardiff Central Station. To meet BREEAM standards we installed MCS approved Stiebel WPF 20 Set S GSHP system with 3no. 103m geothermal probes to deliver the required heating and cooling demand through individual fan coil units for the new station and office areas. Due to the design of the building our GSHP system needed to provide heating and cooling simultaneously which meant careful considerations were applied so that any south facing office space did not over heat due to solar gain from fully glazed areas and at the same time office space on the north side of the building may require heating. The GSHP system has been in operation successfully for the past month and we are very happy with the overall product.