MRCOOL GCIK-CL3T-SM GeoCool Inverter Series 3 Ton Closed Loop Geothermal Installation Kit is an accessory package designed to support installation of compatible geothermal HVAC systems. It works by providing essential components for connecting the heat pump to a closed-loop ground heat exchanger, allowing fluid to circulate efficiently for effective heat transfer. Designed for use wit... https://www.partshnc.com/mrcool-geocool-inverter-series-gcik-cl3t-sm