Cooling Coils are heat exchangers used in air conditioning and refrigeration systems to remove heat from the air or other fluids. They are typically made of copper or aluminum tubing that is wrapped around a series of fins, which increase the surface area of the coil and help to transfer heat more efficiently. In an air conditioning system, a cooling coil is used to cool and dehumidify the air. Chilled water or refrigerant is circulated through the tubing, absorbing heat from the air as it passes over the fins.