👉 In the context of HVAC (heating, ventilation, and air conditioning) systems, an evaporator is a device used to cool or heat fluids. Evaporators are commonly used in refrigeration systems and can be found in various types of refrigerators, such as commercial, industrial, and personal use. Evaporators work by cooling the liquid or gas that it circulates through. When the fluid enters the evaporator, it is heated by the surrounding air and water vapor (if present)