What Are Evaporator Coils and What Do They Do?
An evaporator coil is the part of your HVAC system that removes heat from the air using a refrigerant that runs through copper tubing. It is located near the furnace, which circulates cool air into your home when air conditioning.
How do evaporator coils work?
Refrigerant enters the evaporator coil through copper tubing that is connected to your outdoor unit. Once inside, it then absorbs heat from the air blowing over it. Moisture in that air is condensed into water on the coils, which then flows into the drain pan. This is an important step in the process because by removing this moisture, it lowers the temperature of the air that is blown into your home, creating a more comfortable environment.
The now-warm refrigerant flows to the outdoor unit, and the heat is expelled to the outdoor air. The refrigerant then travels back inside to the evaporator coil to repeat the process.