The MRCOOL GCSCAM048GN GeoCool Inverter Series 48K BTU 4 Ton Multi-Positional Geothermal Coil is a high-performance indoor coil designed for use with compatible geothermal heat pump systems. It works by facilitating efficient heat transfer between the geothermal unit and the conditioned air distributed throughout the building. https://www.partshnc.com/mrcool-geocool-inverter-series-gcscam048gn