Is it normal to drive with the air recirculation on or off?

[McBrianna]

It is more common to use the air recirculation mode while driving. Below are detailed explanations of the car's air recirculation and fresh air modes: 1. Fresh Air Mode (Air Recirculation Off): This mode draws air from outside the vehicle, directs it through the air conditioning system for heating or cooling, and then blows it out through the vents. The fresh air mode essentially replenishes the cabin with fresh air, improving the air quality inside. It is particularly useful for defrosting in winter or defogging in summer, as the air drawn from outside is richer in oxygen and drier, making it more effective for these purposes. 2. Air Recirculation Mode: This mode recirculates the air inside the vehicle, creating an internal airflow cycle. The primary function of the air recirculation mode is to effectively block external dust and harmful gases from entering the cabin. It helps the car warm up faster in winter and cool down more quickly when the air conditioning is on in summer. It is also beneficial to use during smoggy conditions. Essentially, the air recirculation mode maintains the internal air circulation, helping to preserve the cabin temperature more efficiently.