The First Company 9-321-55-3 Evaporator Coil Assembly is a vertical, four-row coil designed for efficient heat transfer in HVAC air-handling and cooling systems. It works by circulating refrigerant through the coil while warm indoor air passes over its finned surface, allowing heat to be absorbed and providing cooled air throughout the space. The integrated TXV regulates refrigerant f... https://www.partshnc.com/first-company-9-321-55-3-coil-assembly-txv