Ground Loop Design is the choice of professionals in over 60 countries and is the world's leading software suite for commercial geothermal heat pump and ground heat exchanger system design. In addition to matching a heat exchanger to a building load, the GLD gridbuilder allows the designer to specify an irregularly shaped loopfield. The CFD module in GLD lets the designer create purgeable, balanced piping interconnection designs that ensure efficient and economical operating costs.