The MRCOOL GCSCAM048GN GeoCool Inverter Series 48K BTU 4 Ton Multi-Positional Geothermal Coil is a water/ground-source CuNi coil designed for efficient heating and cooling in geothermal HVAC systems. It works as the A-coil module, transferring heat between indoor air and the geothermal refrigerant circuit while an electronic expansion valve precisely regulates refrigerant flow. This c... https://www.partshnc.com/mrcool-geocool-inverter-series-gcscam048gn