AC Evaporators are heat exchangers positioned within the vehicle’s HVAC system, typically inside the dashboard air box. They receive liquid refrigerant from the expansion valve/orifice tube, facilitating a phase change to a gas while absorbing heat from the cabin air. Fin and tube construction maximizes surface area for efficient heat transfer, utilizing aluminum alloys for corrosion resistance and thermal conductivity. Core designs vary by vehicle application, incorporating features like parallel flow or serpentine configurations to optimize cooling capacity and airflow. Evaporators often include a receiver/drier integration point and may feature coatings to inhibit mold and bacterial growth.