The answer to 'what is evaporator coil' is the indoor coil in an HVAC system that absorbs heat from the air inside your home. The evaporator coil is a critical component that helps transfer heat from the air in your home to the refrigerant, allowing the refrigerant to cool and dehumidify the air. It's responsible for the cooling process in your air conditioner or heat pump.
The evaporator coil is located inside the air handler or furnace cabinet. It contains thin, metal fins that help maximize the surface area for heat transfer. As warm indoor air passes over the coil, the refrigerant inside absorbs the heat, causing it to evaporate and turn into a gas. This process cools the air, which is then circulated back into your home by the blower fan.