What is the function of the evaporator coil in an HVAC system?

The function of the evaporator coil in an HVAC system is to absorb heat from the indoor air, which effectively cools the air that circulates through the system. When the refrigerant inside the evaporator coil evaporates at low pressure, it absorbs heat from the indoor air as it changes from a liquid to a gas. This process cools the air passing over the evaporator coil, allowing the HVAC system to lower the indoor temperature and provide a comfortable environment.

The evaporator coil is a crucial component in the refrigeration cycle, working in conjunction with other components, such as the compressor and condenser, to transfer heat effectively. By enhancing the cooling process, the evaporator coil plays an essential role in maintaining the desired temperature and humidity levels within a residence.