Cooling evaporator coil is suitable for various refrigerants such as R22, R134A, R32, R290, R407c, R410a etc. The air conditioner’s evaporator coil, also called the evaporator core, is the part of the system where the refrigerant absorbs heat from the air inside the home. That is, it’s where the cold air comes from. It is often located on the inside of the AHU. It works with a condenser coil to complete the heat exchange process that produces cool air.