Does Recirculating Air Save More Fuel Than Fresh Air Mode?

[AthenaFitz]

When using air conditioning, the recirculating air mode is more fuel-efficient than the fresh air mode. Here are the relevant details: 1. Recirculating Air Mode: Recirculating air mode draws air from inside the vehicle and circulates it through the blower, creating an internal airflow loop. It heats up the car faster in winter and cools it down quicker in summer, with particularly noticeable effects during smoggy conditions. This mode not only maintains cabin temperature more effectively but also promptly blocks external dust and harmful gases from entering the vehicle. 2. Fresh Air Mode: Fresh air mode draws outside air into the vehicle, directs it through the HVAC system for heating or cooling, then discharges it through the vents. This mode replenishes fresh air and improves cabin air quality. Since the drawn external air has higher oxygen content and lower humidity, it delivers superior defrosting performance in winter and better defogging results in summer.