What is the Difference Between Internal and External Air Circulation for Heating?
1 Answers
The main differences between internal and external air circulation for heating are: 1. Different thermal insulation effects: In internal circulation mode, the airflow passage between the inside and outside of the vehicle is closed, and there is no airflow circulation without the fan running. In heating mode, this ensures the temperature inside the vehicle. External circulation mode uses the fan to draw outside air into the vehicle, meaning there is airflow between the outside and inside of the vehicle. In heating mode, the warm air inside the vehicle is more easily carried away. 2. Different fuel consumption: Using internal circulation in heating mode results in slower heat loss and lower fuel consumption. Using external circulation in heating mode leads to faster heat loss and higher fuel consumption.