Should You Use Internal or External Air Circulation for Car Heating in Winter?

[LeLily]

In winter, it is recommended to use internal air circulation for heating. There are two methods to operate the air conditioning: First, turn off the AC button, wait until the vehicle starts and the water temperature rises to the normal level, then press the AUTO button on the air conditioning system. Set the temperature to the desired level, and the air conditioning will automatically maintain the set temperature. Here is some relevant information about the car air conditioning's internal and external circulation: 1. Internal circulation, as the name suggests, recirculates the air inside the car. With the doors and windows closed, it only heats the air inside the vehicle, resulting in a faster and more fuel-efficient heating effect. 2. External circulation draws in outside air and expels the air inside the car, keeping the interior air fresh. In winter, when the outside temperature is low, using external circulation will continuously bring in cold air, hindering the rise in temperature inside the car.