Use Recirculation or Fresh Air Mode on Highways?

[DelMadelyn]

Use fresh air mode on highways. During prolonged high-speed driving, prolonged lack of air exchange can lead to stale air inside the cabin, so the fresh air mode should be activated to facilitate timely air replacement. However, if the air conditioning is on during summer, avoid using fresh air mode as it may compromise cooling efficiency. Even if air exchange is desired, it's advisable to briefly activate fresh air mode before switching back. Fresh air mode draws external air into the vehicle, directing it through the HVAC system for heating or cooling before being discharged through the vents. Its primary function is to introduce fresh air and improve cabin air quality. This mode is typically used for defrosting in winter or defogging in summer, as external air is richer in oxygen and drier, making it more effective for these purposes. Recirculation mode, on the other hand, circulates existing cabin air without introducing external air. Its advantages include fuel efficiency and faster cooling. Use recirculation mode when operating the heater in winter or the air conditioner in summer, as it prevents external air from entering, allowing the heating or cooling system to work more effectively.