The answer to 'what is evaporator coil' is the indoor component of an HVAC system that absorbs heat from the air inside your home. The evaporator coil is filled with refrigerant that absorbs heat as it passes through the coil, cooling the air that blows over it and into your living spaces.
The evaporator coil is typically located inside the air handler or furnace unit. As the refrigerant flows through the coil, it evaporates and turns into a gas, absorbing heat in the process. This cooled air is then circulated throughout your home by the blower fan. The evaporator coil is a critical component that works in conjunction with the outdoor condenser unit to provide cooling and climate control for your home.