Should You Turn on the Internal Air Recirculation When Using the Car Air Conditioner?
1 Answers
Whether to turn on the internal air recirculation when using the car air conditioner depends on the specific conditions inside your vehicle. Below are the differences between internal and external air recirculation in cars: External Recirculation: The function of external recirculation is to replenish fresh air. When external recirculation is activated, the air intake located at the firewall is opened by the air conditioning computer, and the vehicle's blower draws outside air through the micro-dust filter into the two heat exchangers (cooling and heating) inside the evaporator. The air processed by the heat exchangers is then blown out through the air vents. Internal Recirculation: In the internal recirculation mode, the airflow channel between the inside and outside of the vehicle is closed. Without the blower, there is no airflow circulation. When the blower is on, the air drawn in comes solely from inside the vehicle, creating an internal airflow cycle. Internal recirculation primarily serves to promptly and effectively block external dust and harmful gases from entering the vehicle, such as when driving through areas with smoke, dust, strong odors, or in dense traffic, preventing harmful exhaust emissions from preceding vehicles from entering the cabin.
