An evaporator coil is a key component in refrigeration and air conditioning systems. It is responsible for absorbing heat from the surrounding air or refrigerant, causing the refrigerant inside the coil to evaporate. This process cools the air that is then circulated throughout a space, making it essential for maintaining comfortable indoor temperatures. Typically made of copper or aluminum, the evaporator coil is located inside the air handler or the indoor unit of a system. Proper maintenance, such as regular cleaning, is important to ensure its efficiency and longevity, as dirt and debris can hinder its performance.